1. There's only light femdom in the game, so if you're into hard femdom, like ball busting etc, I'm sorry to disappoint. But as for soft femdom, I suppose at least Cindy would count. Also Natalie has some femdom-ish scenes in her storyline. In Samantha's storyline a side character has a femdom-ish scene if your character is submissive. The main story has a few in your cabin, one with Nanako and one with someone I'd rather not spoil.
3. Ah, that just marks the end of content for her. I can see now that it can be a bit confusing, heh. Sorry about that :D
5. Not yet! And not for a few updates at least since I'm working on club and school mechanics, plus adding more content to the management game loop.