You are right she doesn't deserve ya'll, but she needs to see what she is missing. Let the kids be available, but you don't need to be available unless it is an emergencey.
I can empathize with you. I too feel like my H turned his back on our family. We are in the process of getting divorced. I was served about 3 weeks ago. When he wants to talk to our DDs 16 & 19 he calls their cell phones. That is about the only contact they have. Honestly, it kills me when they talk to him because I am so angry at him, but I know he is their father and they deserve to have the decision to whether they want to be around him or not. At this point about the only time they see him is if they need something from him. They don't just go "visit" him. Don't do anything to damage your relationship with the kids, they are smart they will see who is really working on being a family. My H has been "living" at his office for 9 months now. The real story is that he is having an affair with his secretary who also left her H the same time my H left me, what a coincidence. So if my daughters want to see him they have to go to his office to see him. Pretty sad,huh?
Life's challenges are not supposed to paralyze you, they're supposed to help you discover who you are. -- Bernice Johnson Reagon