I am posting for a friend.
DFriend and his wife separated around 4 months ago. It has recently come to light (from his DC) that she is seeing someone else. This new boyfriend is already spending time with the 3 young DCs (sleeping round their house at night and also spending time with them during the day). My friend knows this because the eldest DC told his dad that he was uncomfortable with this man sleeping at their house. DCs are 3, 6 and 8.
This man has a restraining order against him from his ex wife and DCs (we don't know why) and also lives in his car.
Friends ex won't speak to him, and doesn't see anything wrong with this new man sleeping at her house and spending time with her kids. This is obviously a very worrying situation. Ex is extremely naive and not very worldly wise at all.
What can he do?