I'm back, on my own.

[canadianMrs.]

Wow, I hadn't realized it had been so long. Up until a couple of weeks ago, things had been going very well for me. As my last posts had said, I had had enough of DH a little over a year ago and fully detached. It took a long time and me with a wall up, but DH and I slowly developed a friendship. This time around it seemed more sincere, because I wasn't hoping for anything else, and we were doing very well at co-parenting. He told me on more than one occasion how much our friendship meant to him and that he wouldn't screw it up again. I won't say the old DH has come back though. That should have been my first clue. He is into pampering himself even more, and a revolving door of girls.
Fast forward to a couple of weeks ago when my dd came to me and told me she had to tell me something, and not to get mad. It turns out DH had my children meet the girl he had the affair with (apparently they are recently back on). Then told them not to tell me. I was floored. First of all, DH is moving away in a few months (closer to us) so there was no reason for my children to meet her. Second, he knew I never wanted them to meet her and he agreed it would never happen. Third, to have my children deceive me. This has spun me backwards. I don't even know where to go from here. He has been pleading with me that he is sorry and made a mistake, but I just don't think I can do it again. I'm getting split advice from family/friends and even my counsellor. Everything in me says enough is enough.
I need a dose of reality from this board,from others dealing with a MLCer and how you would handle this.