My fiance is on aid for food and medical, also her 3 children are as well. Recently she added the third child which was from a previous marriage. This 3rd child when he was a baby was given custody to the father and she was given non-custodial rights. Years later, the father sent the child to the mothers mom's house. And from there (per his permission) the child has moved into my fiance's house. It has been 8 months now, since he moved in with her and he has decided he wants the child back. What rights does he have now? She lives in Nevada, he lives in California.