I just re-read your thread (sorry I can't keep everyone’s story’s straight).
That's okay, there is a lot of us here.
Here's what I want to say:
"When you continue to have contact with her, I feel disrespected. If you continue the relationship with her, then I'll have to consider my options."
I think the hardest part will be having to explain my options if he asks. I don't plan on leaving the house or the kids. The option would be asking him to leave.
I feel like my feelings don't matter to him. That he thinks that I can remain quiet and happy with the current situation. He honestly doesn't want to hurt her feelings and doesn't think too much about mine because I'll stick around. I want to tell him how he is robbing his family of joy and attention. Poor kids just see him on his phone all the time and get ignored often.