I have been dating this wonderful man and we have started talking about getting married soon. He has a beautiful and trying four year old son. whom i have grown to love very much. I do not wish to be his Mother but i would like to be a part of his life. His father and i already make joint decisions about his son. The biomother has him every other weekend from 8am to 5pm. She is not allowed overnight stays. When she had custody she was abusive and neglectful. The father...