Well, it was really word-heavy excuse for Vanilla. Don't get me wrong she IS innocent, but through the game she gained considerable amount of contex about her recent actions. She even feels like she is doing something wrong, but it all falls under her "I like it". It's not wrong to like something, even bad things, but you should be honest with yourself towards this needs. But her? She is trying to find any possible way to justify her discovered cravings. She thinks that MC might be into it, and he might be, but as a player we have a way to choice not to like it, and brush it off like intrusive thoughts (For example, I fucking hate cheating in real life, but the way it represented in porn? That's very hot). So, what's the point of her, "Maybe he is into it?", when she will face reality of NTR route? (Honestly I am ready to explode from excitement to see this scenario progressing).
A lot of this was, is, and will be the cause of her environment's influence: all this gaslighting from her " friends" and bad examples from them having very, very heavy toll on her mind. But it's not the excuse to do so, and to be silent about it with the one and only love you have, as she trying to prove everywhere... Or is it one and only?
All in all, Vanilla and MC both did bad decisions, but ignoring Vanilla's doings and saying "she is lost, she is pure" and blaming now MC for all sins, when he just borrowed money from Vanilla to watch OnlyFans (which, actually, is not a big deal, even tho it presented as a "lie" - he is not meeting those girls), is a huge mistake. She fucked up, and MC, who is fucking blind to his gf's state, is fucked up too, so they shall both face their mistakes to fix their relationships or turn it into NTS (which is the only way at this point, lmao), otherwise it will be our long awaited full NTR route.