I think you should have a proper communication.As you already have two children and you are pregnant.Its not so easy to live alive after divorce.Legal activities have to be take after thinking and having a proper discussion.If you problem is still now solved you must appoint a family law lawyer Centreville, VA who will guide you and help you to take proper decision.

Its really heart broken Its not easy to live with a single parent either father or mother. Specially when you seen your parents happy with some one else.

you should tell you father about it...