Wow, I sure had hoped she would get the boot from OM...and I'm sure she will later, but I had hoped it would not go as far as a PA. Sure sounds like it has based on his & her FB. I am so sorry. Unless OM shows his true colors before she leaves, then I am afraid you are right about her feelings toward you. In my personal opinion, I think it's time to use tough love when she comes back from the trip. I would not stay under the same roof with her since she has been brazen about this A and has not respected you enough to protect your name or your feelings, nor has she cared enough to sheild her children from her adultry. It is so shameless and I believe she should be held accountable for her actions. Will the Church do anything about her membership? She probably won't care since she's gone this far! Anyway, I think you should have her stuff sitting by the door when she comes back home. No more Mr. Nice Guy from this point on. If you don't use tough love now, I think all is lost.
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!