I don't know why this woman has upset you so much? Why don't you trust him? - Before the last weeks lie...
Sweetheart he shouldn't have to pretend to you - you're meant to love him and support him even when knowing how bad he's feeling.
If you don't think that you can get through this as a couple - have you thought about relationship counselling? It might help both of you to say safely what's in your heads and see if you can work it out...
ETA I don't think ANYONE would suffer the way he sounds as if he is as a "get out of jail free card." That's a really harsh thing to say...