(((tennispro))) I am so sorry. This is what is referred to as an Exit Affair from what I understand. I was reading about this in a book I have called, Infidelity: Working Through the Repercussions of Infidelity
by Emily Brown. If you are interested there is a good section in there about Rebuilding When your M Ends with an Affair.
But no matter the term, it hurts. Your H is not taking any responsibility for your M. He will likely never figure out what was broken in him to cheat and is bound to repeat the same pattern all over again at some point in his life.
I hope he gets a handle on this drinking and does some introspection.
Do you have a lot of support?