Good! I would just not talk to your W if it's causing so much pain. My priest told me this: unless she is wanting to work on the marriage, what is there to talk about? I was in a similar position and talking to my W just drove me crazy. So I stopped talking to her. I felt better.
That's how breakups go. The longer you keep talking, seeing each other, and drawing it out the harder it is to let go.
Set that schedule for your daughter and then you don't need to talk to W.
She is sensing that I am detaching and she is (albeit very slowly) starting to "get concerned" and that I should just chat like we "used to".
I still have no regrets going back to my house. She feels uncomfortable, she can get out. Call it an in-house S, call it whatever. I deserve my bed.