There are much weirder things on party:
1- If you play route where MC is lazy and don't go to buy wine to store, you technically not even know, that there is on your party some dude with name "Trevor", because on that route he don't have any line in script, and no single person mention his presence! Nevertheless wife ends up fucking him in bedroom. There is no single chat between them, no visible contact, or flirting, which is shame, because right those thing can build up nice tension in story.
2- Trevor have like 3 lines only, during whole party, and only on route, where MC goes to store buy wine. But what a surprise, he have a avatar with regular face like wife or Autumn! Like why? This dude have 3 lines only, even Henry or Chris don't have one, and those have plenty of lines of text, not to mention that Chris is the one who is supposed to have affair with wife!
3- Autumn's first question to MC when she appear near bedroom is "What are you doing here?" Like WTF?! MC is in his own house, on his own party, he can go where he want and whenever he wants, he can literally climb up on fridge and dance naked there, because it's his house! She act like the party is in her house, not in MC's.
4- On route where MC don't go for wine, he should be so drunken and sometimes passing out, while the whole "wife/Trevor-flirt" thing can nicely build up during those passings and when he wake up he can find some new things, to the point he find fucking in bedroom.
5- MC should have option to peek inside, but though ajar of doors, he can see only how some black ass humping between some white legs, and he can't see their faces, so he is still unsure, if it is his wife, or not.
6- There is another girl on party called "Simona", which have only one text line, and no one mention her afterward. Can she be the girl fucking with Trevor? But I think it was wife.
From all of this I got feeling that development of this event was somehow rushed and there should have been two parties, first in MC's house and second at Autumn's place. But we got one instead...