But the thought of her giving herself so easily to another man while still married to me is just hard to deal with.
I hear you on this. The very thought of sharing myself with another person while married used to seem like an imaginary brick wall going up -- I could not have ever imagined doing such a thing. It was more than wrong, it was sacrilege. So when my W began her A, it blew my mind. And still does. "How can she do this to me and still sleep at night?" I sometimes think.
Then again, I like to remember that people are funny creatures and are capable of doing some of the most unthinkable things. Even fundamentally good people have that capacity. It's not necessarily because they're evil or bad. They're just human, mixed-up and lost to the world. It is our basic nature.
Hang in there, Tele. Life will move on as it will, and you will get stronger as a result.