FFM is guaranteed if you play your cards right, yes.
Still thinking about the whole futa/trap thing. It's something I need to plan around with if I were to implement it. I know it's one of those things that either people love, or hate. If I ever do, just know it will definitely be optional, and no girls will be barred off by a specific fetish (At least the main LI's). So if you want a vanilla (Or vanilla-ish) experience, it can be done. But again, I'm still thinking about it. I may have a clearer answer as I develop the game more. Trust me, you and others have been poking at me with it.
Love Interests as Virgins, eh? How should I know? You'll have to find out when you finally sex that one girl!
In all seriousness... I'd rather keep that a surprise. But I assure you you won't be disappointed.