Hi Justin, I personally think you made the right move in asking her to leave. This woman didn't even bother to discuss the MR, or tell you she wasn't happy or anything that most W's would do. She didn't even try to blame you with anything, which is highly unusual, for a WAW.
Here's the thing, she is completely wayward in her behavior and frame of mind. She makes no bones about her intentions to live wild.....and to blazes with the price tag. She has already had two A's (that you know about) in a very short time. All in all, the outcome must look pretty dark.
First of all I want you to know that I am very sorry for you pain. It is difficult to understand what happens to some people that makes them turn into someone you don't know anymore. Let me ask a few questions, okay? What are the ages of you and your W? What kind of home environment did she have growing up? (divorced parents, abuse, infidelity, very religious, etc.). Has something major happened recently to a family member, a friend, or something that could have influenced her into thinking she had to live as though this might be her last day?
If you haven't read it yet, check out my thread on help for newcomer LBH'S with a wayward wife.
It is not about what you feel should work in your M. It is about doing the work that gets the right results. Do what works!