I don't mind lesbian sex scenes, though it is tiring that so many women are bisexual in these games, but I agree that the whole spy on people having sex the very night you move in is creepy AF. Especially after you learn that Heidi had a creeper who was stalking her that Athena beat up. With that history and without knowing the MC at all Heidi then tries to encourage the MC into spying on the two of them having sex. Makes no sense.
As for romancing either of them, I would normally be a fan of Athena but I'm not interested in breaking up a FWB situation just to get the MC's dick wet. The thing with these games is we have a lot of options so I don't have any incentive to break them up when Val, Mora, Zenda, etc all are going to be available and willing to fuck. I hope we actually get to know the characters and this isn't a game where the lewdness is paramount and the story is an afterthought. I'm not overly concerned right now but it is too early to tell.