Personally I would insist she keep him on her nights because adult GAL is important to your healing too. If your S pushes back tell him that his relationship with his mom is important regardless of what's going on in the marriage and that you want to help him protect that. If there's "not enough for him to do" as has been the case for my kids at my H's place, encourage him to think of a few things he can carry with him over there that he finds interesting.

You've been amazing. I wish I'd been more like this in the earlier days of my troubles. Happy New Year, Poirot.

Me42, H40
D12, S8, S7
A revealed: 7/13
Sep 4/14; Agreed to D 1/15

She believed she could, so she did.