History Main / YourCheatingHeart

* LipstickMark: Lipstick on your collarbone or cheek reveals an affair.

* SecretOtherFamily: A mistress plus kids--a whole second family.

** ''ComicBook/{{Trouble}}'', an infamous and subsequently [[CanonDiscontinuity ignored in can series, tried to retcon that Peter's parents, Aunt May, and Uncle Ben knew each other as teenagers, and that Peter's father Richard and his Aunt May had an affair behind Mary and Ben's backs. [[spoiler:And that Peter himself was the product of said affair, [[FamilyRelationshipSwitcheroo making May his real biological mother]].]]

* Infamous example in Franchise/SpiderMan Sins’s Past as there’s a {{Retcon}} where it’s revealed Gwen Stacy cheated on Peter with Norman Osborn the middle aged father of her old boyfriend Harry whose also Spider-Man’s nemesis ComicBook/GreenGoblin. It gets worse as Gwen gets pregnant with CreepyTwins before she gets her neck snapped falling off a bridge. The flimsy justification is that Gwen was attracted to Norman for same reasons she was attracted to Peter i.e the whole “mysterious man” angle. Not surprisingly most writers ignore this storyline and fans act like it never happened so Gwen can stay the figure of innocence she should be.

Most of us recognize this type of plot: Bob is married to Alice. One day, Bob sees Carol at a club and is attracted to her. Perhaps things haven't been going so well with Alice for some time. Maybe they just had a major fight and Bob stormed off. Or maybe his marriage is perfectly healthy, and Bob has no excuse. Whatever the reason, Bob flirts with Carol, which eventually leads to a sexual or romantic relationship and the various things that entails. But here's the thing: Bob doesn't tell Alice about it. He doesn't dump her, he doesn't tell her that he thinks the marriage is on the rocks, he doesn't talk to her about {{Polyamory}} or swinging, he doesn't even ask for "more space". He continues to play the part of her husband, and expects her to continue being his wife, hoping that Alice won't notice when he starts coming in late for dinner, or ask him about the mysterious expenditures on their joint account. Sometimes, just to really play Alice for a sucker, their marriage will seemingly ''improve''-- he buys Alice gifts, pays attention to her and seems much happier, but all the while he's running off to see Carol. For extra scumbag points, he may be keeping Carol similarly in the dark about Alice. Chances are he'll eventually get caught; if he didn't, the story wouldn't have the same dramatic impact. A lot of angst and tension will ensue.

* In ''[[ComicBook/RobinSeries Robin]]'' Tim's girlfriend Ariana cheated on him a number of times, and at the end of their failed relationship Tim once kissed Stephanie in a moment of joy after she rescued him. Tim and Ari officially broke up the next day and Tim and Steph were dating by the end of the week.
* PlayedForLaughs in ''ComicBook/SupermanRebirth''. Superman and Superboy go to take Boyzarro (Superboy's Bizzaro duplicate) back to his universe and end up encountering Bizzaro Lois. Since normal Lois is fiercely loyal to Clark, it stands to reason that Bizzaro Lois is this trope, especially since she tries to get hot and heavy with Supes, causing him to yelp out "MA'AM!" in panic.

* YourCheatingHeart/WebComics

** RemarriedToTheMistress: A man marries the same woman whom he cheated on his ex-wife with.

* AccidentalAdultery: A character cheated because he was [[ButLiquorIsQuicker drunk]] or caught in a MomentOfWeakness.

* ReallyGetsAround: If someone who's already married has sex with multiple other people.

* WeddingRingRemoval: Someone removes their wedding ring before cheating on their spouse.

** SympatheticAdulterer: Cheater portrayed sympathetically.
** TheUnfairSex: Women who cheat are often portrayed more sympathetically than men.

* TheMistress: A relatively long-term lover who is not married to her partner, especially when her partner is already married.

* AGirlInEveryPort: Traveling and having an affair while you're there.

* Referenced in ''Disney/RalphBreaksTheInternet'' when a clickbait ad says "Sassy housewives want to meet you".

* In Webavideo/EscapeTheNight Timothy DeLaGhetto has a girlfriend at home but tries to run away with Sierra Furtado in the fourth episode.

* ''Radio/OurMissBrooks'': In "Four Fiancés ", Miss Enright, masquerading as Miss Brooks, corresponds in her name with four different men... and proposes marriage to each and every one of them! To get rid of her Texas fiancé, Miss Brooks pretends that Mr. Conklin (who had brought over Miss Enright to force an apology from her) is her straying husband and Miss Enright the other woman!

* A cliché in French vaudeville theater, to the point that the standard scene will feature the wife crying "Ciel! Mon mari!" ("Heavens! My husband!") and shoving her lover in the closet or other uncomfortable location before attempting to mislead the husband.