[Joopna Chiqutora]

I just feel as if so many porn sites I visit have something surrounding this type of porn I just find it odd what I find amusing though is the Tik Toks I see taking the piss out of it   a step sister got her hand stuck in a washing machine her step brother helps her and high fives her when she gets unstuck then he says ‘what did you think was gonna happen   ‘

[moodyf1]

It's basically a cheap "plot" that costs next to nothing to add in to a reg scene

[Ok_Field3571]

I think the meme or comedic aspect of the trope gets people's attention. Attention means mroe views and thus more money in an industry with ever dwindling profit margins. I think stepfather/stepsister porn will remain for those reasons.

[steelproton]

It is very strange. Seemed to come out of nowhere a couple of years ago.

[Johnny Banger]

Has always been around since I can remember. Probably got early traction from hentai.