A character or pair of characters are seen with a kid and are asked if the child is theirs, even if, due to age, there's no way it could be.

Sometimes used as a way of showing that the "parents" are a compatible couple, but more often just for laughs. If the person in question is too ''old'' to be the parent, it may imply a compliment (even flirtation, if the person asking is of similar age).

TruthInTelevision, especially amongst siblings with a significant age difference.

May be combined with SheIsNotMyGirlfriend.
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!!Examples

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[[folder: Anime and Manga ]]

* In ''LoveHina'', Otohime Mutsumi asks if Narusegawa Mei (about 10 or 12 years old) is Narusegawa Naru's (17) and Urashima Keitaro's (20) child. Of course, Mutsumi acts rather dim much of the time.
** In the Manga Naru also asks Keitaro, upon first meeting Sara, if she is one of his many lovechildren, or if he kidnapped her. She is just joking though.
* Ironically, numerous people in ''Franchise/SailorMoon'' comment on Chibi-Usa (8, or 900+), depending on source) being Mamoru's (17-19) and Usagi's (14-16) child. The irony being she ''is'' their child... but [[KidFromTheFuture not yet]].
** Chibi-Usa and Usagi have been mistaken for sisters more than once.
-->'''Mimet:''' Oh...are these your sisters?
-->'''Mamoru:''' No. [[InnocentInnuendo They are my future wife and daughter]].
** Also played with in R ''before'' Chibi-Usa showed up. They were taking care of a baby boy: Minako said called the kid "their child" in good tease spirits, but An/Natsumi was peeved. Also, Chibi-Chibi was sometimes mistaken as Usagi's little sister (and introduced as such, sorta. Ikuko says so).
*** People also often say that Usagi and Chibi-Chibi seem more like mother and daughter than sisters, though.
* ''RanmaOneHalf'' has a unique variation where Ryoga (16) is [[FountainOfYouth turned into a five-year-old]] and mistaken to be ''his own son''. Then again, they might have not jumped to that conclusion if Ranma didn't introduce him as such just to mess with him.
* In ''Manga/{{Bleach}}'', mortals sometimes pose this question to Rangiku Matsumoto concerning Toshiro Hitsugaya, the subversion being that not only is Hitsugaya Matsumoto's superior, they're ''both'' ReallySevenHundredYearsOld.
** On the other hand, Hitsugaya is canonically a child prodigy, and very young for a shinigami. It's easily possibly that Matsumoto is several times his age. The fact that he's her boss, and the more responsible of the two still stands, though.
* In ''GakuenAlice'', Sakura Mikan asks the elementary-school-age Hyuuga Natsume if the 3-year-old Hijiri Youichi is his. Then again, Mikan's a little [[TheDitz dumb]].
* ''SoukouNoStrain'' has an interesting twist, although it looks the same as other examples of the trope. For one, the apparent 16-year-olds are technically much older due to a TechnoBabble-explained paradox with sub-lightspeed travel. For another, the apparent little girl is ReallySevenHundredYearsOld.
** It's surprising for them in another way, since the little girl in question showed up at their table when they weren't looking.
* Parodied in ''SayonaraZetsubouSensei'', the girls mistake Itoshiki's nephew for his son and proceed to accuse him of children neglect.
** Understandable since the kid called Itoshiki "Dad" and asked for food when they first met. He also looks like a child version of Itoshiki right down to the glasses and fashion sense.
* Possibly a variation: In ''KyouKaraMaou'' a young girl shows up claiming to be Yuuri's daughter, and his [[AccidentalMarriage fiance]] [[{{Tsundere}} Wolfram]] flips out, thinking that Yuuri has "cheated" on him...without considering the fact that Yuuri is ''15'', and the girl is about 8.
* In ''TengenToppaGurrenLagann'' during the HotSpringsEpisode, Kiyal asks Yoko (who she just saw a couple weeks ago, and who is 14 years old) whether Darry and Gimmy (who are about five to seven) are her kids. Cue SpitTake.
* In the fourth volume of ''KimiWaPetto'' (''Tramps Like Us'' in English), Sumire and Momo are taking care of six year old genius for a few days and people in the park comment on cute those young parents are.
* Used a bit more seriously in ''BunnyDrop,'' with the nearly-thirty Daikichi and six year-old Rin. A slight subversion in that Rin is biologically Daikichi's ''aunt.''
** To be fair, Daikichi is Rin's father figure and the person who raises her. The only reason he doesn't offically adopt her is because she didn't want to be.
* In ''Manga/{{Gintama}}'', Saa-chan mistakes the baby with Gintoki (who looks ''remarkably'' like him) to be his child with Otae, who just happens to be there at the time. It ends badly (for Gintoki). But the kid is ''really'' cute.
* In the ''YamiNoMatsuei'' manga, [[TheHero Tsuzuki]] meets [[MorallyAmbiguousDoctorate Doctor]] [[BigBad Muraki]] in a MeetCute version, when Tsuzuki catches a fainting little girl and Muraki treats her and asks if she's his daughter. Of course, as it's [[StalkerWithACrush Mur]][[MagnificentBastard aki]], it's a deliberately InvokedTrope.
* In ''HoneyAndClover'', a ryokan receptionist asks Professor Hanamoto if the gang are here for a family reunion and if Hagu is the Prof's middle school age daughter (She isn't).
* ''Manga/ToLoveRu'' occasionally has people mistaking [[PlantAliens Celine]] for Rito's daughter (and whatever girl he's with as the mother). It's actually forgivable in this case, as Rito is 17, and Celine looks to be about 2, so it's actually possible. Of course, one of the people who makes this mistake is Rito's mother, who should know better.
** Then again, similar to ''Bunny Drop'', Rito is sort of her father figure.
* Baby Be'el of ''Manga/{{Beelzebub}}'' is constantly mistaken for Oga's son. This is another occurence where it is a natural assumption. Oga is a 15-16 year old, while Beel looks a year old, or less. Plus, Oga is supposed to raise him, and they look ''very'' similar.
** Aoi is often mistaken for her baby brother's mother whenever they go out. It really annoys her since the gossiping housewives think that she's an irresponsible teenage single mom.
** Aoi is also mistaken for Be'el's mother when she and Oga are together. The fact that Be'el is quite fond of her is part of it.
* One of the epilogue side-stories to ''VictorianRomanceEmma'' shows that Grace Jones is occasionally mistaken for Colin or Vivian's mother. She does not take it well.
* After the Lord of Terror arc in ''Manga/AhMyGoddess'', Megumi meets Skuld for the first time, and asks if she's her brother and Belldandy's kid. This despite the fact that Skuld is biologically around 12, and Keichii has known Bell for maybe a year and a half at this point.
* Happens several times in ''LightNovel/KokoroConnect'' after [[spoiler: one of Heartseed's associates causes the group to de-age at increasingly random times.]]
* In ''Manga/ACertainScientificRailgun'', Mikoto finds a little girl named Febri sleeping in the park and picks her up. Kuroko assumes the child is Mikoto's daughter, even though Mikoto is 14 and Febri is about 8. Everybody rolls their eyes.
* In ''Manga/{{Yotsuba}}'', when Yotsuba succeeds in delivering milk to Fuuka, someone thinks she's Fuuka's child. For clarification, Fuuka is 16 (hence why she gave her "15 years old" shirt to Yotsuba for recycling), and Yotsuba is 5 (and even if they don't know that, she's clearly able to converse somewhat), so while it wouldn't be ''impossible'', it's kind of improbable.
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[[folder: Comic Books ]]

* In ''ElfQuest: Siege at Blue Mountain'', Cutter pays a visit to the human couple Nonna and Adar and assumes that the three children living with them are theirs even though they are too old. His misunderstanding is due to the elves' low birth rate, and their general ignorance of human gestation periods and growth rates.
* In ''ComicBook/TheSmurfs'' story "The Baby Smurf", the Smurfs are all wondering whose child that Baby Smurf is, and Brainy has the audacity to suggest that the child could be Smurfette's, which she rewards with throwing objects at Brainy.

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[[folder: Fanfic ]]

* Roleplay/DCNation: Troia was asked several times if Lian was "hers." Because of her Truth Sense, she would have to answer "no," but Lian would cheerfully answer "Yup!" Part because Lian cannot stand her super-villainess mother, and part because Donna's been "Mom...in all the ways that count!" They met half-way; Donna is now Lian's ''stepmother.''


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[[folder: Literature ]]

* [[ButtMonkey William Laurence]] gets subjected to an age-appropriate variant twice concerning the same child over the course of the Literature/{{Temeraire}} books.
** In ''Empire of Ivory'' when he, {{Temeraire}}, several uniformed crewmen, and a twelve-year-old girl attended an Aerial Corps fundraiser. His father Lord Allendale, after the latter cheerfully admitted to Laurence and Temeraire personally tutoring her; cornered his son and quietly made diffident, embarrassed, and evasive inquiries as to the health of the young girl's mother. To deny the unspoken accusation would have made Laurence look even worse, he could not reveal her [[TheSquadette true status]] in public, and his attempt at a bare bones[=/=]true-as-far-as-it-went explanation ("She is the natural daughter of... a gentlewoman living in Dover, whose education I have taken as my charge") did ''nothing'' to allay suspicion[[note]]said [[TheLadette "gentlewoman"]], who he had in fact been sleeping with occasionally since they met four years prior, laughed herself sick when she heard about the mixup[[/note]].
** In ''Blood of Tyrants'', [[spoiler: after losing his memory and being (re)introduced to his crew (including 16 year old [[PluckyMiddie Midwingman]] [[TheSquadette Roland]]), Lawrence tries to piece together what he can of the the last eight years through the correspondence in his cabin and finds A) a letter from his mother mentioning a gift sent to one 'Miss Emily Roland'; B) a decidedly casual and friendly note from an Admiral ''Jane'' Roland; and C) records of him paying a hired chaperone for the younger Roland out of his own pocket. His first reaction is to consider how many holes there may be in the parts of his memory he thought he retained.]]
* Occurs in several Creator/PGWodehouse stories.
* More or less inverted in ''{{Twilight}}'': the Cullen parents always present the teen vampires as their adopted children, because the ages wouldn't fit. Then Bella and Edward pretend they adopted Renesmee, because even assuming Bella and Edward had a shotgun wedding, [[ExpressDelivery it's impossible that Nessie to be born so soon when the pregnancy was not visible at the wedding]].
** Not to mention the fact that Edward wasn't even in the area during the time she should have theoretically been conceived.
* In ''Fifth Chinese Daughter'', the narrator's little brother is often mistaken for her son, since she's about twenty years older than he is.

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[[folder: Live Action TV ]]

* Lucy from SeventhHeaven took the twins out for a stroll and was mistaken for their mother, which opened her eyes to the plight of single mothers.
* Buffy was mistaken for Dawn's mother in the first episode of the seventh season of ''Series/{{Buffy|the Vampire Slayer}}'', "Lessons".

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[[folder: Video Games ]]

* ''VisualNovel/PhoenixWrightAceAttorney''. Pearl tags along with Phoenix and Maya, but whenever Maya is not present, some of the [=NPCs=] believe Pearl is Phoenix's daughter. On the other hand, it works entirely backwards in ''Apollo Justice'' with Trucy, who says Phoenix is her father despite her being in her early teens and Phoenix having no children seven years before. It takes a while till we realize she's adopted.
* In ''VideoGame/TheWalkingDead'', Lee gets this in regards to the girl he's protecting, Clementine, a lot. It helps that he's a 30-something black man and she's a 10-year old AmbiguouslyBrown girl.

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[[folder: Web Comics]]

* ''Webcomic/MenageA3'': In [[http://www.ma3comic.com/strips-ma3/gonna_get_it_big-time! these]] [[http://www.ma3comic.com/strips-ma3/what_grade_is_she_in strips,]] Sandra manages to mistake the petite Zii for the daughter of the Amazonian [=DiDi=]. Zii enjoys the mistake.

[[/folder]]

[[folder: Western Animation]]

* ''WesternAnimation/AvatarTheLastAirbender'': Sokka (15) and Katara (14) (who are actually brother and sister) pose as Aang's (12, or [[HumanPopsicle 112]]) parents when he enrolls in a Fire Nation school because [[IJustWantToBeNormal he wants to be normal]] for a little bit and find out some things about the Fire Nation. They pull it off! All Sokka had was a [[WigDressAccent fake beard/mustache]] and Katara just stuffed her shirt to make it looked like she was pregnant (or fat).
** FridgeBrilliance: In a world where the average marriage age seems to be about 16, its a bit easier to accept that the school might not find Katara and Sokka's youth too unbelievable. Now, the fact that both of Aang's 'parents' seem to have a significantly darker skin tone then him on the other hand...
*** Maybe they thought he was adopted? [[WarIsHell There are a lot of orphans on this show...]]
* In ''FamilyGuy'', Meg gets mistaken for her brother Stewie's mother, and then goes along with it to get a job and tips.
** And then Promptly gets Stewie taken away by Child Services when she fabricates hardships to increase her tips.
** Stewie initially protests being used this way but changes his mind after the diner's fry cook gives him some pancakes. Stewie develops a bit of an addiction for them.

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