My son is in an abusive relationship. Few facts: they split up (sort of) sleeping apart for the last 3-4 monthshe doesn’t want to move out and loose his direct contact with the kidsHe escaped for about a month: he was coming to our home every day and spending his (50%) time with the kids she would have her 50 % timehe would then go home at bedtime and they would spend their time in separate parts of the house.he was proceeding with trying to get a separation agreement with great difficultynow he is back and we haven’t seen the grandkids for over a week. he was over a few days ago and said they are trying to make it work.I am very worried. For all intents and purposes it appears that she has gained control again. What do we do?