It sounds like you are asking all the right questions. Only you can fully answer them however. If you educate yourself and make sure they are educating themselves too, eventually the answers will come to light. This forum is a great place to do that among other sites too.
In a nut shell the only thing to do right now is to be honest with yourself, with them and start talking about how they would like it all to work. I would wonder what their intentions are and what their goals are. How do they feel about alone time with you? What kind of boundaries have they already negotiated? What kind of boundaries do you have? Lots to talk about. Good luck.
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