Line #39 Main/FlirtyStepsiblings


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17	[[quoteright:349:[[WesternAnimation/MartinMystery https://static.tvtropes.org/pmwiki/pub/images/fss1.png]]]]
18	[-[[caption-width-right:349:Martin's feeling the brotherly warmth… not just in his heart, but also in his pants.]]-]
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20	->'''[[Series/TheBradyBunch Greg Brady]]:''' No, we wouldn't go to hell, because she's not really our sister.\
21	'''Peter Brady:''' So these feelings are natural?
22	-->-- ''WesternAnimation/RobotChicken'', "[[Film/MrAndMrsSmith2005 Mr. and Mrs. Brady]]"
23
24	So you've got two unrelated teenagers whose parents have recently gotten hitched. Said teenagers happen to have compatible sexual/romantic orientations. Whether they find it {{squick}}y or not, hormones are going to fly.
25	Usually this is seen in the undertones of their behavior in a show, and it almost always happens when two people become step-siblings in adolescence. Sometimes though, this is unintentional on the part of the writers and attempts to make new step-siblings act like long-time siblings [[PlatonicWritingRomanticReading just come off as flirty]].
26
27	The RomanceNovel is also fond of this trope, generally involving older stepsiblings. It has the double effect of giving them reason to resent each other over their lives' disruption and giving them no way to escape the other entirely (without cutting off from their [[ThickerThanWater parent]] as well).
28
29	Sort of a vanilla SubTrope of NotBloodSiblings. '''The key difference is the age at which they met.''' Stepsiblings who became stepsiblings before puberty fall under NotBloodSiblings, not this.
30
31	See LittleSisterHeroine for when the relationship is made more explicit and emphasized. This may be played as part of BlendedFamilyDrama.
32
33	If they get together first and ''then'' their parents get together, that's a RetroactiveStepsiblingRelationship.
34
35	People who become step-siblings at a very young age and grow up together are more likely to consider each other truly siblings and thus off limits for dating. This may also cross the line in the supposed UsefulNotes/WestermarckEffect. This trope can be TruthInTelevision for many stepsiblings whose parents married during or after their puberty, though they rarely end up becoming an official couple due to social factors.
36
37	----
38	!!Examples:
39	[[foldercontrol]]
40
41	[[folder:Anime & Manga]]
42	* Another rated manga example, ''Ai Don't Koi'' from Yasuhira Nakanishi. The main character struggles between two choices: one is his [[ChildhoodFriendRomance Unlucky Childhood Friend]] whom he always thinks of as a little sister, another is the girl whom he had a gigantic crush on -- until her mother married his [[TheCasanova father]].
43	* ''The Big Stepsis Who Wants to Be a Big Sister vs. The Little Stepsis Who Wants to Be Yuri'' is about two girls, Shio and Kafka, who become stepsisters after Shio's mother marries Kafka's father. As the title implies, Shio wants to be a good older sister to Kafka, while Kafka is in love with Shio.
44	* Defied in the manga version of ''Manga/BunnyDrop''. One of the reasons why Yukari and Daikichi decided against becoming an OfficialCouple was to avoid this trope. Daikichi's adopted daughter Rin and Yukari's son Kouki have romantic feelings for each other as teenagers. [[spoiler:Ultimately Rin and Kouki break up and Rin ends up with ''[[WifeHusbandry Daikichi]]''.]] The anime adaptation and film adaptation ignore the timeskip so they have [[MaybeEverAfter more implications]] that Daikichi and Yukari ended up together.
45	* Subverted in a case of ''Manga/CaseClosed''. [[spoiler: A woman named Kimie had to give her toddler daughter Yukiko away to her husband's family due to [[BreakTheCutie the terrible circumstances she was going through after her husband was in jail]], and didn't know what had happened to her for many years. In the meantime, she got married to a man named Tsujimura, who had just gotten divorced and had a son named Takayoshi. Several years later, Takayoshi falls in love with a girl and brings her photo to his dad and stepmom... and the girl turns out to be Yukiko, who doesn't know anything about it. Tsujimura has a FreakOut and [[ParentalMarriageVeto forbids Takayoshi from dating Yukiko]], having recognized the girl's identity as his wife's estranged child... which he shouldn't have known, which then leads [[MurderTheHypotenuse to a]] [[UriahGambit horrifying reveal]].]]
46	* ''Manga/CherryJuice'': As the series progresses, step-siblings Minami and Otome often switch between sharing flirtatious romantic moments and BelligerentSexualTension.
47	* Yuzu and Mei from ''Manga/{{Citrus}}'' are two step-sisters who have to deal with their attraction to each other. Yuzu only liked males until she [[ClosetKey met Mei]]. Unlike some examples, Mei's father and Yuzu's mother marry at the start of the series, forcing the two to decide what kind of relationship they have.
48	* The whole point of ''Manga/TheDevilDoesExist''. Kayano and Takeru are in high school when their parents get engaged and start living together. Takeru heavily pursues Kayano, and naturally she gives in. Things get... complicated... as Kayano tries to keep their relationship secret to avoid breaking up their parents'.
49	* ''Manga/DomesticGirlfriend'': Protagonist Natsuo has this two-fold, with several issues added into the mix. The elder sister, Hina, is his teacher, [[HotForTeacher whom he's been in love with for quite a while]], while he met the younger, Rui, in a casual outing with his friends and ended up losing his virginity to her. Then his father announces he's getting married again and, surprise, the woman's daughters are none other than Hina and Rui.
50	* This is the starting point of an h-manga titled ''Giri Giri Sisters'': [[{{Tsundere}} Mion]] has fallen in love with her classmate Tsukasa, but [[CanNotSpitItOut before she gets up the nerve to confess]], her widowed or divorced mother marries his widowed or divorced father. Compounding the problem, her younger but much curvier sister Kotone is also hot for their new stepbrother, and not at all shy about saying so and demonstrating it. The good news is, Kotone's not just willing but eager to [[{{Polyamory}} share Tsukasa with her big sister…]]
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52	%% ADMIN NOTE: ''kiss×sis'' was cut per P5 decision. Do not re-CamelCase the link or recreate the page.
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54	* [[spoiler: Kazuma and Tsubasa]] from ''Manga/HisAndHerCircumstances''.
55	* ''kiss×sis'' is about two twin sisters who love their stepbrother very much. Their mom and the stepbrother's dad approve. He doesn't. HilarityEnsues.
56	* Though not teen-aged, Erio and Caro from ''Anime/MagicalGirlLyricalNanohaStrikers'' were both technically adopted by Fate and, as shown in the companion manga, think of themselves as step-siblings, although they'd never met prior to the start of the season. However, their relationship is so close as to be romantic that even other people in-universe [[ShipperOnDeck tried to push them toward each other]]. Pretty much becomes official as of ''[[Manga/MagicalRecordLyricalNanohaForce Force]]''.
57	* The main couple of ''Manga/MarmaladeBoy'', which starts with the two leads's parents switching partners and then all deciding to live together in one BigFancyHouse.
58	* In ''Manga/RandomWalk'', Yuka gets tutored by her "older brother" Towa, who is actually the son of her dad's second wife from her previous marriage. At first, she sees him as nothing but an AloofBigBrother, until [[spoiler:he kisses her while drunk]], and realises that their lack of blood relation means that he's a guy she can potentially date. [[spoiler:]]
59	* Yuuka and Atsuro Kiryuu in ''Manga/SensualPhrase'', though only in the manga. One of the side-stories [[ADayInTheLimelight focuses on this]], [[spoiler: and specially when Riri Kinoshita, an IdolSinger who has a crush on Atsuro, blackmails him into pretending to be her boyfriend under threats of spilling out the beans about their "incestuous" bond, which would ruin Atsuro's budding career. And then she pisses him off via verbally abusing poor Yuuka...]]
60	* The manga ''Yoru Made Matenai'' is built around this trope, with a wee bit of borderline [[LoliconAndShotacon shotacon]] fanservice.
61	* ''Anime/VoltesV'': So, it's somewhat played with. [[spoiler: [[AlienPrince Prince]] [[EvilPrince Heinel]] is aloof to everyone he meets, except [[HotConsort Katherine]] [[{{Ojou}} Rii]], his MoralityPet who he shows occassional amounts of emotional vulnerability towards. Throughout the anime, Heinel and Katherine's romance is mostly unrequited because Heinel is a {{Tsundere}} and Katherine CannotSpitItOut. It ends in tragedy when Katherine sacrifices her life to save him, giving him a DyingDeclerationOfLove before she passes, which in turn causes Heinel to cross the DespairEventHorizon. What makes this complicated? Well, after the anime ended, [[Creator/TadaoNagahama the creator]] [[WordOfGod released]] the [[https://www.amazon.co.jp/-/en/dp/B01J145D2K Roman Robo Anime Climax Selection]], which contains many other details about the anime - one of which is that after Heinel's grandparents died, Katherine's family took him in and raised him as one of their own, something that even ''[[VideoGame/SuperRobotWars 3rd Super Robot Wars Alpha]]'' confirms. Even if they are step-siblings in the technical sense, Katherine and Heinel do not regard each other as such. Heinel often refers to Katherine as a friend, as does the aforementioned book, stating that Katherine befriended Heinel when she saw him being bullied and felt protective of him. Their relationship is treated as a ChildhoodFriendRomance more than anything]].
62	[[/folder]]
63
64	[[folder:Comic Books]]
65	* Invoked in passing in ''ComicBook/KillingAndDying''; the two leads of "Go Owls" once roleplayed as stepsiblings during sex.
66	[[/folder]]
67
68	[[folder:Fan Works]]
69	* ''Fanfic/AllAssortedAnimorphsAUs'': {{Defied}} in "What if Peter and Naomi got married?". Jordan already has a crush on Marco, so when Marco learns they're going to become stepsiblings, he acts as unappealing as possible to turn her off him.
70	* There are a fair number of ''Franchise/NeonGenesisEvangelion'' fanfics that have both Asuka and Shinji officially adopted by Misato, making them technically stepsiblings. This usually doesn't stop them from pursuing a romantic relationship anyway. It's explicitly referenced in [[https://www.fanfiction.net/s/13892902/1/Strangers-in-Tokyo-3 Strangers in Tokyo-3]], where Asuka won't agree to the adoption until she receives assurances that she can still get married to Shinji someday.
71	[[/folder]]
72
73	[[folder:Films -- Live-Action]]
74	* ''[[Film/TheBradyBunch A Very Brady Sequel]]'' approaches this trope when Greg and Marcia are reminded that they actually aren't at all related. In this case, it's also a reference to the fact that the actors playing Greg and Marcia (in the 70s TV series) were in an on-off relationship during their time on the series.
75	* ''Film/{{Clueless}}'' has Cher and Josh. It helps that their parents are no longer married.
76	* ''Film/CruelIntentions'': The plot is driven by a girl promising her besotted stepbrother sex if he does what she wants. ''Film/NotAnotherTeenMovie'' parodies this with them actually being related, and the brother being utterly repulsed at the idea, but going along with TheBet for other reasons.
77	* ''[[Film/DaddysHome Daddy's Home 2]]'' has a rare one-sided version of this. Dylan finally kisses the girl he has a crush on UnderTheMistletoe, [[spoiler: but it turns out to be his stepsister Adrianna. Not only was Adrianna repulsed by the kiss, the entire family was shocked by this sudden turn of events.]]
78	* ''Film/DriveMeCrazy'' has a variant of this -- [[spoiler: the two teenagers have a mostly-normal romance, and their parents get married at the ''end'' of the movie.]]
79	* ''Film/Flower2017'': When told to comfort Luke, Erica offers him a blowjob. Luke is aghast at the possibility of getting a blowjob from his future stepsister. However, he confesses his love for her later and they have sex.
80	* The comedy ''Film/LoneStarStateOfMind'' (produced by Edward Zwick, of ''Film/{{Glory}}'' and ''Series/MySoCalledLife'' fame) has stepsiblings who are engaged. They had been dating when their single parents married each other and continued the relationship after that.
81	* In ''Film/LoversOfTheArcticCircle'', Otto's divorced father marries Ana's widowed mother first when the two children are just ten years old. Then, as they are living together in the same house, a teen romance gradually develops between Ana and Otto into a full-blown sexual relationship which, however, they manage to keep completely secret from their parents/step-parents to the end.
82	* Nemo and Anna in ''Film/MrNobody'' started off as ChildhoodFriends who start developing a romantic relationship and later become step-siblings.
83	* This is brought up ''Theatre/OnAClearDayYouCanSeeForever''. Todd Pringle (played by Creator/JackNicholson) points out that, since he is just as much in love with Daisy (played by Music/BarbraStreisand) as Doctor Chabot is, perhaps he (Todd) might make a suitable match for her. When Dr. Chabot points out that Todd is Daisy's brother, Todd responds with, "Only by marriage... she's my step-sister, not my blood-sister."
84	* Kind of in ''Literature/ThePerksOfBeingAWallflower''. Sam and Patrick are initially mistaken for a couple by Charlie as they are so comfortable around each other, but they laugh when he asks how long they've been together and reveal that they're step siblings. Not only that, but Patrick is gay as well.
85	* The horror movie ''Film/{{Teeth}}''. The brother has spent most of his life with a crush on his step-sister and despises their parents for making them siblings.
86	[[/folder]]
87
88	[[folder:Literature]]
89	* In the ''Literature/AmeliaPeabody'' books, Ramses and Nefret were raised as siblings from the ages of ten and twelve, respectively, but ended up falling in love and marrying, albeit with some complications.
90	* ''Literature/BigTrouble'' by Creator/DaveBarry subverts this. Matt and Jenny have a strong crush throughout most of the book. When their respective dad and mom hook up in the epilogue, however, they only go out on a few dates before realizing the whole thing's a little weird and deciding to just be friends.
91	* The whole point of ''Literature/BrothersConflict'', specially its visual novel counterpart.
92	* Harry and Elaine from ''Literature/TheDresdenFiles''. They were both adopted by their EvilMentor in their early adolescence, having no known genetic connection. Once puberty struck they took their relationship in the expected direction. For extra {{squick}} and horror, their EvilMentor (and foster father) secretly encouraged it to keep them isolated from their peers, paving the way to magically brainwashing them into being his enforcers.
93	* In ''Literature/EromangaSensei'', Sagiri and Masamune become stepsiblings and are immediately shown to have varying levels of romantic interest in one another, with the disjoint between wanting to hold on to the only "family" they have left and wanting to become a couple making up one of the major points of conflict.
94	* Blair and Aaron in the ''Literature/GossipGirl'' books.
95	* Julia and Tiberius in ''Jeg elsket Tiberius'' (''I Loved Tiberius'').
96	* ''Literature/{{Malevil}}'' has Jacquet and Miette. They are lovers as well, but Jacquet has to [[EthicalSlut share her]] with [[{{Polyamory}} every other man]] at Malevil.
97	* The whole plot of ''Literature/MyStepmomsDaughterIsMyEx'' is centered on this trope. Main characters Mizuto and Yume previously dated before, but they broke up, only to find two weeks later that their respective parents have decided to marry each other and they'll now all live under one roof. The rest of the series is about them trying to live as stepsiblings but still dealing with their lingering feelings for each other.
98	* In the 18th-century French FairyTale novella ''Princess Lionette and Prince Coquerico'', the protagonists, Lionette and Coquerico, are stepsiblings. About midway through the story, it's revealed that Coquerico's mother, after handing over her son to the fairy Cornue, met Lionette's father and married him. (And, being a fairy tale, WickedStepmother comes into play, with Coquerico's mother devising the plan to get rid of Lionette.) This revelation does not prevent Lionette and Coquerico from falling madly in love with each other -- the two of them get married at the end of the story.
99	* A technical version occurs in ''Literature/SongOfTheLioness'', when Alanna's [[ParentalSubstitute adoptive father Myles]] falls for George Cooper's mother Eleni and they marry. Technically this means that Alanna and George are step-siblings when ''they'' rekindle their romance and get married, but given that they're adults and the other circumstances, the trope isn't played at all.
100	* In ''Literature/TheTestamentOfSisterNewDevil'', predictably, Basara has much romantic and sexual tension with his new sisters Mio and Maria. But in reality, they are actually the new demon lord and her assistant respectively. But even after finding out, he still does what he can to protect them from demons and others that want Mio dead. And Maria, being a succubus, naturally likes to tease him.
101	* In ''Literature/TheTwilightSaga'' all the Cullens are adopted siblings and most of them are in a relationship with another Cullen, though the siblings thing is largely an act to explain why they move and cohabit together. In the movie, Jessica calls attention to how weird it is for them to act as siblings and be in a relationship.
102	* In ''Literature/UglyLove'', Miles and Rachel began an intimate relationship despite being stepsiblings; in their defence they'd already been attracted to each other before they became stepsiblings, as neither of them knew their parents were romantically involved until ''after'' they met. They were also 18 at this point, so they weren't raised together as siblings. However, they still knew their relationship [[PlayedForDrama would be seen as taboo]] and so initially kept it a secret. [[spoiler:Their parents weren't too happy when they found out, especially because Rachel [[TeenPregnancy got pregnant]], though they eventually accepted it after Rachel gave birth to her and Miles' son. Unfortunately, Rachel and Miles' relationship fell apart not long after and took their parents' marriage with them, though due to reasons unrelated to them being stepsiblings]].
103	* Discussed at length in ''Literature/WeCantRewind'':
104	-->'''Denise''': "What if all this other stuff had never happened? I mean, what if we'd never gone on this cruise, just spent a week in Vegas for our honeymoon, or something, and then we'd gone home and raised our kids normally? I mean, as normally as we could, of course. And what if they'd just naturally gotten sweet on each other when they got to be teenagers? Would you have let them go on dates with each other?"
105	* In ''Literature/TheWindEye'' Beth and Mike's parents married when they were in their teens, and, now sixteen, they have become close friends. The exact nature of their feelings for each other isn't stated, but when Beth decides she's not cut out to be a nun, it's hinted that Mike may be part of the reason.
106	[[/folder]]
107
108	[[folder:Live-Action TV]]
109	* Inverted by Gina and Boyle in ''Series/BrooklynNineNine'', they had a sexual relationship, but when their parents got together and eventually married they had already broken up. This doesn't stop Boyle from bringing up their sexual history while talking about them as being stepsiblings.
110	* On ''Series/{{Degrassi\|TheNextGeneration}}'', Clare dates her mother's fiancé's son Jake. Later on, when they are thinking about having sex, Jake says they should just end the relationship because if they break up painfully it would get awkward, seeing as they are now related.
111	* From the Taiwanese drama ''Series/DevilBesideYou'', Qi Yue was being bullied by the son of the school's president, Jiang Meng, only to [[AllGirlsWantBadBoys fall in love with him]], after realizing that he was a JerkWithAHeartOfGold and actually a decent guy. Before either of them could understand their feelings, her widowed mother and his divorced father began dating, eventually becoming engaged. One of the main conflicts of the story is the main couple trying to work out their relationship amidst their parents' relationship as well.
112	* ''Series/TheFreshPrinceOfBelAir'': Inverted. Will's mother and Lisa's father take a liking to each other, and after their kids decide (at the altar) that they're not ready to be married, their parents step up, saying "[[WhyWasteAWedding Why waste a perfectly good ceremony?]]". [[WhatHappenedToTheMouse Interestingly enough, Lisa and her father both disappear immediately after the episode, rendering the point moot]].
113	* ''Series/{{Glee}}'': Now that their parents are married, Kurt and Finn. Of course, Kurt originally tried to get Burt and Carole together in an attempt to [[InvokedTrope invoke this]], as he had a crush on Finn for months beforehand ([[IncompatibleOrientation it didn't go very well]]). In every episode thereafter, however, well and truly averted; Kurt's interactions with Finn are nothing at all like his flirty, adoring interactions with his boyfriend Blaine, and the two stepbrothers seem to be uninterested in each other much of the time, and even vaguely dismissive.
114	* In ''Series/GossipGirl'', Serena and Dan find themselves in this situation when their parents, Lily and Rufus, marry each other. [[spoiler: After they divorce, Dan and Serena get together, and end up marrying in the finale.]]
115	* Derek and Casey from ''Series/LifeWithDerek'' have a relationship full of BelligerentSexualTension. This was unintentional on the writers' part, but very intentional on the actors'.
116	* Michael Fairgate and Paige Matheson had a relationship in Season 8 of ''Series/KnotsLanding''.
117	* ''Los Serrano'' has the relationship in between Marcos and Eva. {{Lampshade\|Hanging}}d in a dream sequence [[spoiler:[[ItWasHisSled despite the series itself being]] AllJustADream,]] where Marcos says their relationship isn't incest, "more like stepincest".
118	* ''Series/{{Lost}}'': Boone is in love with his step-sister Shannon. Shannon is aware of it and frequently uses it to take advantage of him, [[spoiler: culminating in them having sex followed by her blowing him off once she's gotten what she wanted]].
119	* Morgana and Arthur in ''{{Series/Merlin\|2008}}'' had a [[UnresolvedSexualTension very charged]] relationship in Season 1. Morgana is Arthur's father Uther's ward and Gwen states that everyone assumes Morgana and Arthur will marry one day. Then Season 3's "The Crystal Cave" [[spoiler:reveals that Uther is Morgana's biological father, having had an affair with his friend Gorlois's wife Vivienne, making them half-siblings]].
120	* ''Series/ModernFamily'' has a Flirty Step-Uncle. [[KidAnova Manny]] develops a one-sided crush on his (older) step-niece, Haley. He also makes a few flirty comments to her sister, Alex. Both of the sisters are thoroughly disgusted by this. This has dropped in more recent seasons, but now Manny's adopted younger step-niece, Lily, has a crush on ''him''.
121	* ''Series/PrettyLittleLiars'': Stepsiblings Jenna Marshall and Toby Cavanaugh.
122	-->'''Aria:''' Toby and Jenna had a relationship.\
123	'''Spencer:''' Way beyond step-siblings.\
124	'''Aria:''' Yeah, they… were involved.\
125	'''Emily:''' Romantically?\
126	'''Spencer:''' I doubt I'd call it ''romantic''--I doubt she had much of a choice.
127	:: Because AllAbusersAreMale and DoubleStandardRapeFemaleOnMale, it's assumed that Toby was the [[SexualExtortion perpetrator]]. He wasn't. AdaptationalConsent was in play.
128	-->'''Jenna:''' You need to be home. Where you're safe.\
129	'''Toby:''' You could chain me to this porch and I'd still never touch you like that again.
130	* ''Series/{{Reaper}}'' has Sock getting a stepsister. She thinks of them LikeBrotherAndSister, but tends toward much IDidntMeanToTurnYouOn. ''He's'' trying to get in her pants. ([[{{squick}} He eventually succeeds]].)
131	* The popular Danish drama ''Seaside Hotel'': Fie and Morten get married after Fie's father Peter Andreas and Morten's mother Molly do, although Fie and Morten met and became romantically involved before their parents did.
132	%%''Series/TheSecretLifeOfTheAmericanTeenager''
133	* ''Series/{{Shake It Up}}'' has the {{Belligerent Sexual Tension}} variety between [=CeCe=] and Logan [[spoiler:, although it is subverted since the parents didn't get married.]]
134	* The reality show ''Series/SisterWives'' has a downplayed example in married couple Kody and Janelle. They were young adults, out of the house, before their parents got married. They pair later got married themselves.
135	-->'''Kody:''' It's not like Janelle was raised under my dad's roof, and it wasn't like I was raised under her mom's roof. We're not siblings. Gah, I just--I never even thought about how weird that was, cause you and I knew each other long before our parents knew each other.
136	* Inverted in ''Series/TeenWolf'': Scott and Allison are dating in the early seasons before Scott's mother Melissa and Allison's father Chris become an item in the last season. [[spoiler:In that case it help that Allison is dead by that point.]]
137	* The German comedy series ''Türkisch für Anfänger'' ("Turkish for Beginners", 2006-2008) is about the family consisting of therapist Doris Schneider, her children Lena and Nils, her lover, later husband, police inspector Metin Öztürk, and his children Cem and Yagmur. One of the major plotlines of the series is the on-again-off-again romance between stepsiblings Lena and Cem. [[spoiler: At the end of the third season the two are a couple and Lena is pregnant.]]
138	* ''Series/{{Veep}}'': The Season 7 premiere quickly reveals that the woman that Jonah married in-between seasons is his (former) stepsister from one of his mom's previous marriages. Neither of them sees anything wrong with this.
139	* Justin and Tiffany are this in ''Series/WaterlooRoad''. The end up secretly dating.
140	[[/folder]]
141
142	[[folder:Video Games]]
143	* In ''VideoGame/FireEmblemFates'', [[spoiler:any marriage between the Avatar and their Hoshido "siblings" is revealed to be this, and not [[BrotherSisterIncest what they originally thought]].]] Additionally, the Avatar and their Nohr siblings are this as well.
144	** Also, Azura can marry her Nohrian step brothers, Xander and Leo. [[DownplayedTrope Arguably]], Ryoma and Takumi could count, too, since she was never officially adopted but lived with them for as long as the Avatar was in Nohr.
145	* In ''VideoGame/FireEmblemThreeHouses'', Edelgard and Dimitri turn out to be step-siblings despite numerous characters playing ShipperOnDeck for them early on. There is still a bit of ShipTease between them even after this reveal, and Edelgard's Goddess Tower scene heavily implies Dimitri was her FirstLove. That said, Dimitri says he prefers to think of Edelgard as a ChildhoodFriend rather than a sibling. [[spoiler: This is played for tragedy later when they end up as enemies.]]
146	* [[EvilMentor Master Li]] in ''VideoGame/JadeEmpire'' runs a martial arts school, and his two prize students ([[TheHeart Dawn Star]] and the [[PlayerCharacter Spirit Monk]]) both are his adopted children. [[spoiler: After certain revelations about Master Li, it becomes apparent that there is also a case of [[KissingCousins flirty stepcousins]] if the Spirit Monk enters into a relationship with Silk Fox.]]
147	* Neraxis from ''VideoGame/KingsRaid'' acts this way towards his step-sister Laias which infuriates Lilia, who is Laias' biological sister. [[note]]All three of them are descendants of ancient dragons.[[/note]] This gets lampshaded in a few official 4-komas.
148	* ''VideoGame/TheLegendOfHeroesTrailsInTheSky First Chapter'' has Estelle Bright developing a relationship with her step-sibling Joshua that ends with Joshua kissing Estelle [[spoiler:except he's actually feeding her a sleeping drug and tells her to forget about him after he remembers who he really is.]] Their relationship gets better in ''Second Chapter'' and ends up becoming the OfficialCouple for the Sky series.
149	** Her successor, Rean Schwarzer from ''VideoGame/TheLegendOfHeroesTrailsOfColdSteel'' for the most part is oblivious to Elise and her feelings for him. It isn't until ''Cold Steel IV'' where she finally confesses her feelings to him and even then it's only during her bonding events where Rean finally figures out. Whether he reciprocates or not however [[DatingSim depends on the player]].
150	[[/folder]]
151
152	[[folder:Visual Novels]]
153	* In ''VisualNovel/CinderellaPhenomenon'', one of Lucette's love interests is her stepbrother Rod. In his route, they have an enemies-to-lovers romance.
154	* In ''VisualNovel/DanganronpaV3KillingHarmony'', this serves as the premise for Tsumugi’s Love Hotel scene.
155	[[/folder]]
156
157	[[folder:Web Comics]]
158	* The very last strip of ''Webcomic/OzyAndMillie'', with a few hints shortly prior, indicates this is going to be how things are for the title characters.
159	* {{Inverted}} in ''Webcomic/SomethingPositive.'' As part of her back story, Vanessa had a brief fling with a guy she knew from school, though the two broke up on amiable terms. Later, her mom married his dad. The awkwardness got significantly worse when the guy, who had a very laidback relationship with his father, casually brings this up, not realizing how much it would freak Vanessa's mother out.
160	[[/folder]]
161
162	[[folder:Web Original]]
163	* ''WebVideo/FriendshipIsWitchcraft'' features a (mostly) one-sided flirtation between Twilight Sparkle and Shining "Francis" Armor. In [[WesternAnimation/MyLittlePonyFriendshipIsMagic canon]], they're biological siblings, but in this universe, [[RunningGag "They're not biologically related, so technically it's okay."]]
164	* Mickey and Audrey on ''Home Schooled. The two usually spend their time bickering, so this could be BelligerentSexualTension / SlapSlapKiss.
165	* ''WebAnimation/HomestarRunner'': In the WebAnimation/StrongBadEmail "what i want", Strong Bad says he wants a hot stepsister for [[YouMeanXmas Decemberween]].
166	[[/folder]]
167
168	[[folder:Western Animation]]
169	* ''WesternAnimation/{{Sixteen}}'' has Jonesy and Jen in spades; they even kiss and Jen admits she used to have a crush on him.
170	** This applies to all the [[DirtyKid Garcia boys]] for both Jen and [[TheGloriousWarOfSisterlyRivalry her older sister, Courtney]]; Diego and Jonesy both openly ogled Courtney's breasts and Robbie peeked under Jen's dress when they were getting fitted for the wedding.
171	** Ultimately subverted, as all of the above behavior happens before their parents' marriage, save for Diego ogling Courtney, which happens at the wedding. After the marriage, they seem to have settled into ordinary [[AnnoyingYoungerSibling sibling behavior.]]
172	* ''WesternAnimation/MartinMystery'': It takes the subtext to the nth degree. They were really pushing it to the limit. That's what happens when you take characters who were lovers in the original comic and turn them [[DubText into]] NotBloodSiblings.
173	* In one episode of ''WesternAnimation/TheSimpsons'', Homer is opposed to the thought of his dad marrying Marge's mom.
174	-->'''Marge:''' Homer, what possible reason could you have against Grandpa being in love?\
175	'''Homer:''' If he marries your mother, Marge, we'll be brother and sister! And then our kids - they'll be horrible freaks with [[AmazingTechnicolorPopulation pink skin]], no overbite, and ''[[FourFingeredHands FIVE FINGERS ON EACH HAND]]!!''
176	* ''WesternAnimation/TeenageMutantNinjaTurtles2012'' has Leonardo and Karai. They're flirty before they realize that Karai is actually the long-lost daughter of Splinter (aka Hamato Yoshi), who raised Leonardo from childhood. After the reveal, they actually grow closer, and though the attraction isn't explicitly referred to as much, they tend to treat each other a bit too intimately for step-siblings.
177	[[/folder]]

Context Main / FlirtyStepsiblings