This doesnt seem like an issue of a child sleeping with a parent, at all....a much bigger issue and I only hope that this man doesnt get to keep this child.
While my daughter still wants to sleep with me and I often allow it....what you have mentioned is WRONG!

Just to make sure I understand....the child is sleeping with gradma and grandpa? I dont see anything wrong with this. Do you have reason to believe this is done in a bad way or for a bad reason?

Does she also sleep in the Uncles bed who is looking to adopt her, and become dad?