1) If she was 16 when you had sex, you are in luck; in your state, 16 is the age of consent, so you did nothing legally wrong. (if you were 18 and she was 15 however, then you committed a crime).2) No, her parents may not force her to have an abortion. Of course, unless you can support yourself, her, and a child, since they could look to cut off support to her, you and she may be in a precarious position if you two insist on having the child.