No, it's not. Hm... maybe I shouldn't spoil it, but I don't think its a huge deal anyway, especially if people are just quitting before then... The space girl is the cosplayer girl you're supposed to meet. The tentacles are Kareen controlling another costume with succubus magic. During that scene, the space girl's wig falls off, and she actively says she's 'got to try to stay in character,' but is having a hard time because it feels too good. Maybe that's another blurry line, because she's having them play out a sort of rape fantasy for her, but it's still 100% consensual on her part; in fact, in the dialogue just after that scene it's implied she met Kareen earlier (when you were knocked out if you chose to split up), and they talked about it.
It's just roleplay though. If that she was getting 'raped' was the only thing that killed it for you, go back and finish it. Personally, I think it's got a ton of problems, but it's a lot better than some others I've seen.
