Just a word from a "single" mom. I used to leave and get to work every morning at 7 am when H was at home, but now I am about 15 minutes later. W's schedule probably has changed too because of adjusting to you being gone. Nothing bad happening, just her adjusting to the new situation and doing what is best. Now that she is used to it, she may like it more.
I also like what TT said. It seems that you have stopped the D train for now, but next is becoming friends again. You need to start the small talk with her like you would with some female you were interested in and didn't know. When you see her say hi, how is your day, be polite. She may respond in a mean way, but at least you are being nice when you are in physical contact with each other because of the girls. Right now it seems like you are really resenting W and if she did ask you back tomorrow, it would be bad to go because you have some major issues with her. You need to work through those on your own now so if/when she is ready to work on you together you are ready as well.
Me29 S3 H left 4/1/09 I file 8/2/10 Divorce final 5/17/11 1st http://www.tinyurl.com/25lhu52 2nd http://www.tinyurl.com/2c35ueg 3rd http://www.tinyurl.com/322yk89