See, this is what I mean about settling on all the ground rules for the separation ahead of time.

I'd be inclined to let her keep her Friday plans at your home. You had no agreement restricting this, correct?

Tell W you'd like to get together to agree on the terms of separation. Write it all down. Then there is no misunderstand or "making up rules" or taking of liberties as you go. Don't forget to include duration.

Take some time to figure out what terms you want before the meet up. Allow W to have a say in this. Negotiate with her.

I don't think you have much say on her entertaining at the other house.

M: A really long time.
Crisis: 5 years.
She's still worth it.

Life is never made unbearable by circumstances, but only by lack of meaning and purpose. -Viktor Frankl