Yep... so here is what I just sent her via email:

"I've been thinking quite a bit over the last month and I've come to some realizations. While I admit that I wasn't the perfect husband, I feel like I've been more accomodating than necessary in regards to you and OM. I'm stunned that you can "fall in love" with someone so quickly after the 7 years we have been together.

I've made some serious mistakes in the last few weeks by giving you the opportunity to have it both ways.. the offer for kisses, the hugs, etc. I can't do that anymore. I feel dirty and used when that happens.
Especially when it is returned by you spending more time with him.

You will always hold a special place in my heart.. no question about that. I need to move on. It's not fair to me.

I will maintain a level of friendship with you as it relates to the girls. That's only fair for them.

I wish you and OM the very best of luck.

If for whatever reason you decide you would like to work things out between us, then we can sit down and talk about it. I can't make any promises though."

So what do you guys think?