you say she's acting cold, distant and removed,
her behavior in this area isn't going to improve, it will likely get worse as she progresses with this affair and that's part of the WAS mentality, get used to it, expect it and respond calmly & assertively each time - remember, boundaries, they're in place, enforce them, don't let her walk all over you - these are all tests see how much she can push you, she's learning she can push you quite a bit and then make you apologize on top of that.

I'm not liking that, I hope you understand where I'm coming from how you communicate wimpy, wussy behavior like that.