BTM, *before* you tell your kids about what you did, be very VERY clear to yourself what you expect to accomplish by doing so.
My guess is that it's guilt that prompts you to tell them. Guilt is one thing, but always remember that you can't put the genie back in the bottle. What they know they cannot unknow.
PLEASE talk to an IC or someone before you do this.
Realistically, don't tell them. And get help so that you can forgive yourself someday. IMO, it would be a huge mistake to bring it up with them.
Me 43 W 38 M 5 T 7 SD20 S15, S13 with 1st W ILYBNILWY June 2010 Separation/Bomb July 2010 Divorce Feb 8, 2011