thank you! <3 coming out as a proshipper online is harder than coming out as gay to your parents
the most extreme stuff...hm. for the not shared ones - its incest for wendy and piss for stan. they do engage in these for the other, though. stan doesn't mind calling wendy mommy or roleplaying a bit even if hes not really into it. wendy gets shy about the piss stuff and does it very occasionally. [she absolutely refuses to piss in stans mouth tho]
the awkward moment i can think of off the top of my head is definitely wendys piss shyness or whatever you can call it. the very first time stan convinced her to do it she couldnt relief herself at all. just stood above him while he lied in the bathtub, her bare pussy out for an embarassing amount of time as he waited. she eventually gave up. it was difficult to talk her into doing it again.
besides that, theyre both into emeto and pet play, although the pet plays get the most intense. they have dedicated "training weeks" whenever their schedules allow them to, where stan lets wendy take care of all of his needs for a whole week

i think about this all the time!! i have many different scenarios for how they started getting kinky 🤔 my favorite one is that they discovered their kinks at the same time as they experimented together (because theyre each others firsts), so there was no specific "introducing" moment. wendy feels anxious about not being in control - it affects how she prefers to have sex with stan. they discuss it together (as in, what she wants them to do this time. or maybe stan suggests it first 🤔), she discovers bossing him around really turns her on, and stan discovers letting wendy take over turns him on too. it just happens, really.
but thats mainly for their sub/dom dynamics. i hc both wendy and stan with some taboo kinks too. for wendy's incest kink, i think she would feel too nervous about it to sit stan down and explain it to him. she would test it out in the act, just as many other things. even if wendys sudden "call me your mommy" takes stan off guard at first, hes in the middle of having a good time and too horny to think about it too hard, so he just does. he might bring it up later, when theyre lying next to each other in bed. wendy would avoid elaborating "im tired, just go to sleep stan" or would shyly answer his questions.. i think her strong personality and past trauma makes her scared of being too vulnerable and its a rare sight to see her not being confident, just awkward in her wording. stan finds it cute but is always gentle with her in those moments.