I get what your saying, (sorry if I skipped any more bickering that finished this convo already)... I dont remember who I picked between Kylie/Rylie, probably the one who was closer to sex, while also not allowing for much sex to Jason... But I remember that scene differently than your describing, unless you later changed it ? I played both (but I dont do multiple plays, I pick my own canon one and stick to it, for all games).
A) MC chooses Kylie (teacher/mom), and has sexy naked time with her before he nearly has sex with her and is knocked out by Lileva, Jason takes Riley almost forcibly by making her suck him off ONLY ... he didnt sex with whether in her ass or vagina...
B) MC chooses Rylie (young one), and has I beleive a 69 with her ? possibly anal sex ? Cant remember that scene all too well... in this route Jason takes the mom(Kylie) to his room, and it is implied he fucks her... your not SHOWN that thank god !
That said those scenes while not my cup of tea, arent rage inducing cause this was Lileva fucking around with that family... for those saying MC is NTR's Jason... Just stop !! No he isnt, his mom and sister dont love Jason that way, that was all Lileva's BS doing ! However once that spell is done, Jason is still acting like a fucking tool, and the girls dont put a stop to it... maybe now its due to Cherry being the one fucking with their heads ? Otherwise it makes no sense why they would keep commiting incest... since they never liked Jason that way, unlike MC's mom who was totally into that shit without influence.
Personally I'm just glad you said Jason wont feature much more into the story... However I do want to know why he went full retard... when MC asked Cherry she was about to answer what is wrong with Jason, and stops... I'm hoping it has something to do with supernatural forces, otherwise the dude went from tolerable to garbage out of nowhere.