JH - I know this is counter to DB principles, but to me your blowup was warranted. There are limits to the amount of control you can have. When you start messing with a man's children and add insult to injury by not only replacing him as a husband but also as a father (and with an OM no less), it seems to me he has a right to strongly object! (though it would be good to give yourself a little time to cool off before reacting).
This is just more evidence that people in affairs are essentially drug addicts. They lose all common sense and all sense of decency. In my case, the W sleeps with her boyfriend in our marriage bed down the hall from my daughter, and there's nothing I can do about it.
All you can do is work on yourself and be a rock for your kids while letting time go by. Time is on your side. In the meantime, the kids really need one sane adult parent, and you're it. Keep hanging in there. It will take months, but your time will come.
LL
M 63 W 40 M 4/91 S14/D9 bomb 7/6/07 D filed 8/3/07 final 2/4/08 thread