Sorry to hear that but it is so predictable in these sitches. Before you do anything is an affair a deal breaker for you?
You can ask her to leave but you can’t force her to leave.
The first thing we suggest is to ask her to leave the marital bedroom or better yet move her stuff into the guest room. That is a sign of strength that you are not going to share the marital bed with a cheater.
Just know she is probably going to fight it. If she asks you why just say you know why.
Once we know more about you stance on an affair we can discuss confronting her.
Again, I’m really sorry you are going through this right now.
