This is JMO......I don't think you should apologize for checking her phone. I think she planted a trap. If you apologize, she is going to twist everything around about not being able to trust you and get herself out of the hot seat. Frankly, I suspect she has a second phone she uses to contact OM, and that's why she is suddenly leaving her main phone laying around with practically an invitation card for you to check it.
Be prepared for MC, b/c many WW's use the session to announce she is ready to D. They really want the MC to help you accept it, and maybe discuss how to arrange child care, etc. So, brace yourself.
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!
