I think what both parents did was awful. It was horrible for the mother to lie about who the father was and it was just as horrible for the father to abandon the child he had raised for 10 years just because he found out she was not biologically his. He created a bond with that child and has a moral obligation to continue that relationship. Maybe not a financial responsibility, but I can't even imagine how devastating it is to a child to have the man she considered Dad to just walk out of her life because she's not his blood-related daughter. The children should be the focus here, not what the parents did. Both parents made horrible mistakes but this child should not have to suffer because of them. Yes Mom messed up big time and created the situation, but Dad should still maintain the relationship he's always had with his daughter, whether or not she's biologically his or not. If you raise a child for that many years I believe then you are a parent and need to stay in the child's life.
