History BrotherSisterIncest / WesternAnimation

*** A reference to the fact that Milhouse's parents look extremely alike. Aside from Milhouse, they're the only naturally blue-haired characters in the series. (Marge dyes, to maintain the naturally blue hair colour she had in her youth. Although in one episode it was revealed she didn't know she'd gone grey, and her hairdresser had been dyeing her hair back to blue for years, with the smell of the chemicals giving her repeated short-term amnesia over the matter.)

* In ''WesternAnimation/HarveyBirdmanAttorneyAtLaw'' Phil runs away from his wedding to Birdgirl to run off with his sister Phyllis, so revealed because Phil's daughter Judy refered to her as 'Aunt Phyllis'. Given how Phil doesn't know [[ParentalIncest Judy IS Birdgirl]], it was probably for the best.

* Parodied in ''WesternAnimation/TwoStupidDogs'' in an episode where the dogs go to live with a family much like the Bradys from ''Series/TheBradysBunch'' (which is about a mixed family so the siblings are not biologically related). The teenage brother and sister get into a fight, before the mom tells them to kiss and make up. They proceed to do so ''literally'' by [[GettingCrapPastTheRadar making out]].

* ''WesternAnimation/FamilyGuy'' did an incest joke about Donnie and Marie.
** In a recent episode, Meg asks Chris if he wants to "practice kissing again." Chris didn't even bat an eye.

* In ''WesternAnimation/TheTransformers'', Orion Pax and Ariel were originally boyfriend and girlfriend. After their bodies were destroyed, Alpha Trion recreated them both as Optimus Prime and Elita One and the two continued the relationship in their new lives. Their anatomy turned out to be so similar that Optimus is able to save Elita's life with an energy transfer, and Optimus seemed a bit taken aback when Alpha Trion told them about their origins. When she steps close to him at the end, he even walks away quickly. No one outright mentions the word "incest", but it's heavily implied that something weird's going on.
** "Something weird is going on" is that Optimus had forgotten who his creator was so it's more surprise that he's learned Alpha is his deadbeat dad. Also Elita was leaning in for a kiss so it may be more "hero denying his pleasures" than anything else. Also two reasons he denied her: [[MoralGuardian parents' anger]] at robots kissing and kids' reaction to seeing a parental (albeit fictional) figure smooching other than a quick peck on the cheek.
* In ''WesternAnimation/SouthPark'', there is an episode in which Stan has problems with his older sister, Shelly, who constantly beats him. When he asks his friends' help, Kenny suggests something through his orange parka. Although his words are muffled, the suggestion is obvious, because Stan replies, scandalized: "Sick dude, she's my sister!"

* In ''WesternAnimation/AmericanDad'', in the Episode "Stannie Get Your Gun," Roger tricks Steve into believing he's adopted. This triggers a bit of a HeroicBSOD in Steve and one of the first things he does is go to his sister Hayley, says there's always been "sexual tension" between them, then makes out with her. Hayley is understandably surprised and repulsed. Roger didn't intend it to happen, but he's not complaining either. ("Anything that happens after this point is ''gravy''.")

** Cletus and Brandine are related to each other in all sorts of ways. One of them being as brother and sister.
*** Brandine is also revealed to be Cletus' ''mother'' in one episode. [[RuleOfFunny Yeah, it's like that.]]

* Aversion: With the communal raising of children the titular species employs in ''WesternAnimation/{{Gargoyles}}'', this was an early fan idea about Demona's and Goliath's relationship, until WordOfGod severely beat that out of the fandom by stating that the pheromones a gargoyle releases when he is courting smell horrible to any close family relation. This is only natural, really, since nature prefers genetic diversity over in-breeding.
** Interestingly, gargoyles still consider the other gargoyles they were raised with to be their siblings, but coupling inside this social family appears to be perfectly normal simply because if they had already evolved a ''physical'' mechanism to prevent inbreeding (the pheremones), then there'd be no pressing advantage to evolving a ''psychological'' mechanism (Westermarck Effect -- the origin of the incest taboo).

* In ''WesternAnimation/AlvinAndTheChipmunks'' , a made-for-TV Movie revealed that [[spoiler: the Chipmunks and the Chipettes were related]].

* ''101 Dalmatians The Series'' had Two-Tone and Lucky as love interests. They're siblings, though it's never mentioned, and to make matters worse they're not supposed to be NotBloodSiblings; they were of the original 12 pups. It's possible the show did change their bond or the writers assumed she was adopted.

* An episode of ''KingOfTheHill'' had Bill meet and fall in love with a beautiful single mother named Charlene. Dale, suspicious of her daughter, does a DNA test and discovers that she has the same paternal DNA as Joseph, which means they're both [[ChocolateBaby Chocolate Babies]] fathered by John Redcorn. When Hank tells Peggy, she freaks out because the two kids have been getting very close and sends Bobby off to play fifth wheel and prevent anything really {{Squick}}y from happening. In the end, the Hills convince Redcorn to seduce Charlene away from Bill, leading to her moving away.

** Kyle suggests that Stan use ThePowerOfLove to stop her, just saying "Shelley, you're my sister and I love you..." the next time she tries to beat him; Kenny then finishes Kyle's sentence with "...and I want to take off your bra."

* ''FamilyGuy'' did an incest joke about Donnie and Marie.

** In the episode "Little Girl in the Big Ten", Lisa speaks with a college girl (Carrie), and Lisa almost admits that thinks Bart is cute.

** Cletus and Brandine from ''TheSimpsons'' are related to each other in all sorts of ways. One of them being as brother and sister.

** In episode "Little Girl in the Big Ten", Lisa speaks with a college girl (Carrie), and Lisa almost admits that thinks Bart is cute.

* Cletus and Brandine from ''TheSimpsons'' are related to each other in all sorts of ways. One of them being as brother and sister.
** Brandine is also revealed to be Cletus' ''mother'' in one episode. [[RuleOfFunny Yeah, it's like that.]]

** One episode had a brother and sister newa crew, Tom and Tammy Thompson, as lovers.

** Even weirder: Meg's dialogue suggests that upon reflection she might not be averse to the thought of doing it again, even going all the way with Chris. He, however, tells her, "Don't count on it."

* ''Disney/101Dalmatians The Series'' had Two-Tone and Lucky as love interests. They're siblings, though it's never mentioned, and to make matters worse they're not supposed to be NotBloodSiblings; they were of the original 12 pups. It's possible the show did change their bond or the writers assumed she was adopted.

* In ''AlvinAndTheChipmunks'' , a made-for-TV Movie revealed that [[spoiler: the Chipmunks and the Chipettes were related]].

'''Farmer''': I don't trust you, you put your seed in my daughter's belly, you're fired!
'''Worker''': But Pa you can't fire me!
'''Farmer''': You're lucky you're my brother too or else I'd kill you!

* In ''WesternAnimation/AmericanDad'', In the Episode "Stannie Get Your Gun" Roger tricks Steve into believing he's adopted. This triggers a bit of a HeroicBSOD in Steve and one of the first things he does is go to his sister Hayley, says there's always been "sexual tension" between them, then makes out with her. Hayley is understandably surprised and repulsed. Roger didn't intend it to happen, but he's not complaining either ("Anything that happens after this point is ''gravy''.")
** In the episode "Meter Made" Roger paints a nude picture of Hayley (who was posing for an art class) and starts loaning it to Steve for use as ''masturbation material''. In Steve's defense, he didn't know it was Hayley (the painting stops just above her lips) and he's completely {{Squick}}ed out when Roger lets it slip. Likewise, Hayley never actually blames Steve and is just as angry over Roger screwing with the poor boy's head as she is over him selling her nude image in the first place.
** In the episode "An Apocalypse to Remember" The Smiths are invited to a party celebrating ethnic minorities in America. Unfortunately, due to Stan misreading the invitation, the family turn up wearing blackface make-up and the Smiths are forced to leave embarrassed and angry. At the car this dialog take place:

* In ''WesternAnimation/AmericanDad'', In the Episode "Stannie Get Your Gun" Roger tricks Steve into believing he's adopted. This triggers a bit of a HeroicBSOD in Steve and one of the first things he does is go to his sister Hayley, says there's always been "sexual tension" between them, then makes out with her. Hayley is understandably surprised and repulsed.
** In the episode "Meter Made" Hayley poses nude for Roger for his painting. Steve ''masturbates'' to it. In his defense, he didn't know it was Hayley (the painting stops just above her lips) and when he finds out he's understandably {{Squick}}ed out.

*** A reference to the fact that Milhouse's parents look extremely alike. Aside from Milhouse, they're the only naturally blue-haired characters in the series. (Marge dyes.)

** Jackal from "Western/Animation/{{Gargoyles}}" is, along with his sister Hyena, one of the most ridiculously AxCrazy characters in the Disney canon. However, when Hyena falls in love with HumongousMecha Coyote, he seems to find it a little more reprehensible than just a normal big brother would, especially considering it's nothing worse than what he's done, and comes off much more as a jealous StalkerWithACrush. He later got most of his body replaced with cyborg parts, and they end up in a pretty sick LoveTriangle for most of the series.
*** While Jackal's disgust for Hyena's robophilia is fact, there's no actual evidence that his reasons for this are anything more than the normal reaction to discovering your sister likes to [[spoiler: hump toasters]]. There's nothing in canon or Word of God to suggest there was a love triangle at all- especially since Coyote wasn't interested in Hyena, either.

* There's some {{subtext}} in [[http://au.youtube.com/watch?v=XRjb8sMjYu8 this touching number]] from ''WesternAnimation/AnAmericanTail.''

** In the episode "An Apocalypse to Remember" The Smith's are invited to a party celebrating ethnic minorities in America. Unfortunately, due to Stan misreading the invitation, the family turn up wearing blackface make-up and the Smiths are forced to leave embarrassed and angry. At the car this dialog take place:

* In [[TransformersGeneration1 G1 Transformers]], Orion Pax and Ariel were originally boyfriend and girlfriend. After their bodies were destroyed, Alpha Trion recreated them both as Optimus Prime and Elita One and the two continued the relationship in their new lives. Their anatomy turned out to be so similar that Optimus is able to save Elita's life with an energy transfer, and Optimus seemed a bit taken aback when Alpha Trion told them about their origins. When she steps close to him at the end, he even walks away quickly. No one outright mentions the word "incest", but it's heavily implied that something weird's going on.
** "Something weird is going on" is that Optimus had forgotten who his creator was so it's more surprise that he's learned Alpha is his deadbeat dad. Also Elita was leaning in for a kiss so it may be more "hero denying his pleasures" than anything else. Also two reasons he denied her: [[MoralGuardian parents' anger]] at robots kissing and kids's reaction to seeing a parental (albiet fictional) figure smooching other than a quick peck on the cheek.

* There's some {{subtext}} in [[http://au.youtube.com/watch?v=XRjb8sMjYu8 this touching number]] from ''AnAmericanTail.''

* In ''SouthPark'', there is an episode in which Stan has problems with his older sister, Shelly, who constantly beats him. When he asks his friends' help, Kenny suggests something through his orange parka. Although his words are muffled, the suggestion is obvious, because Stan replies, scandalized: "Sick dude, she's my sister!"