Hmmmm. That is a tough one. I am in a different sitch since my H and I don't have children together.
Just a suggestion, but is there any way that you could leave the house on the nights he is going to visit? It might make it easier on you, and allow him to see what "single" parenthood is like. It will give him the time with the children, and you get a bit of a break. Go to Starbuck's with a book, see a movie, something like that.
I can't imagine it is easy to go completely dark when you share children, but maybe by minimizing the contact you and your WAS have together, it will make it easier for you to tolerate.
(((Chris)))
I hope it gets easier for you.
Lola
Im still standin better than I ever did looking like a true survivor feeling like a little kid Im still standin after all this time and Im picking up the pieces of my life without you on my mind..