I have a cousin who resides in Missouri. He is on the birth certificate for a litlle girl who is 4 yrs old. He and his mother have always been a part of her life. She spends every weekend with his mother and has her room at grandma's. He currently pays child support and his mother also helps as well whenever the child's mother asks for money. He just found out that he is not the childs father througha paternity test. Do they have any rights?