First of all........slap on the hand for snooping! It does NO good.
Now that you got your 2x4......I'm so sorry about what you discovered. It sounds like he is sort of pushing himself on her. I see nothing in her email that insinuates she wants to make plans with him. And he states that he feels the "talk" will be about him not stopping over anymore. It's actually a good thing. Whatever is going on between them may soon be over.
All that being said, you DO need to detach completely. Let H deal with the consiquences of his A (be it emotional or physical). Continue to do the things you have been doing for yourself. I know this is a blow, a big one at that....but you can and will get through this. If you detach to the point where reconciliation is not possible, then you know that YOU hung in there and tried everything possible to make it work. H cannot blame you for not trying. And don't ever let him try to.
Also....the money thing. You didn't say anything about that. Are/were you aware that he owed her money? Or is that a surprise to. If I am reading right, she has a baby?
Hang in there, stop snooping, detach and focus 100% on you.
~SE
I'm moving on...at last I can see...life has been patiently waiting for me.
Me-32 WAH-35 DD-11 DS-4 H left 11-03 Piecing- 12/04 WAH again- 03/07 Married 12 years Divorce final May 15, 2007