I don't think it's necessary, but XW asked for that early on and I agreed. It's an established norm at this point and I feel the consistency of that (if not the interactions with her mother) are positive for her. When she has D on her weekends, I get to talk every night for a few minutes around bedtime. Changing that norm would also mean giving that up.
As far as reminders... Yes, you're right. "The only winning move is not to play." I have a calendar for D, XW has access to it, that should be enough.
