Just wanted to clarify really. My sister's husband finally moved out last week and today has taken there 9 month old ds for the day. He has quite a troubled past and his dad took him from his mum when he was small (which he thinks was the right thing to do despite his dad being very controlling, maybe to the point of being abusive towards his mum) Although it is unlikely we are wondering what would happen if he wouldn't bring him back? Would my sister have any rights?