@Lukeprice,
This reply is the opposite of your previous one, yet nothing has changed.
That's your problem, inconsistancy, nobody will be able to predict how you will react to anything, or the same thing.
I think it's a mask, your first post was what you thought you ought to say, the mask.
Your last post sounds like real you full of resentment and lashing out.
Glitterbag is a wonderful person, it's not her fault your wife cheated on you, so don't take out your resentment on her.
The only thing I have sympathy with you is the timing. She threw that in your face six months ago, this isn't something that happened thirty odd years ago. It's six months, and you have to deal with inserting that unwelcome fact into the memories of your first few years together.