I agree with SR. I can't see anything to be gained here by confronting or demanding honesty. What is done is done. It's over. If you do want to DB to regain your W then I wouldn't even go there. She'll spill the beans when she feels ready. Don't twist a need for revenge into a fantasy about an honorable parting of ways. To be screwed around on is the most horribly painful experience one S can lay on another. To want some kind of explanation or to inflict some kind of retribution is an understandable feeling. Don't bother. Bottom line is something was missing from your M and your W went out to find it somewhere else. Was she wrong to do so, damn right! But its done, finito. Let it rest in peace.