I am sorry to hear that your H introduced the kids to OW. You knew this was going to happen sooner or later, so at least it's over. You don't need to stress about it, worry about it or fight it. It's time to let go of that. Concentrate on what you can control.
Glad to hear that you are keeping busy.
The only thing I really don't know what to say about is your new guy. I am very old fashioned and for me, dating while still married is just not an option. But please understand that I am not judging you here. I understand this is different for everyone and I respect that.
Should I infer that like since you have filed for D and are dating, you are done with your M?
If so, I am glad that you have found closure and are moving on with your life trying to make the best of it.
Keep us posted on your progress!
Me & H: 44 D7, D6, S3 Together: 20y, M: 17y EA: 11/13/10, Sep: 12/23/10 EA becomes PA: Spring 2011 H filed for D: 09/06/12 D Negotiating began 2/15 OW seemingly gone on 3/15 Still negotiating D
