I am a single parent living with my parents (the child's grandparents). I was looking into sharing custody with them as they play such an important role in her life. What would be the benefits and drawbacks to doing this? Also, what would be the implications for the father who has choosen to not be in the picture? If he decided down the road he wanted custody or visitation, how would that change things? Also, I hope to be able to file for child support from him, would that not permit me to do so anymore?