I have really been liking this girl, and I think she has really been liking me. Anyway, she has a son who is 3 years old. From what I know (although there is still a lot I dont), his biological father is pretty good with him. If I get serious with said girl, what is my responsibility with her kid? I would have no problem being a father to him, but at the same time, I don't know how to treat or interact with him if she doesn't want anything like that from me because she wants his real father to raise him, too.