1) Unless something is directly related to the missable quests, you are good.
2) I never put the actual code for that choice. I have been thinking if it's worth the effort, and so I have neither removed the option or worked on it. While I think it would be cool, I wonder if people would just want sex scenes (and so, the art that goes with them), and it might be a little too much at this point. I guess I could take it one at a time, and mix in some non-sexy scenes depending on who's the father.