I agree with you. I have no intention of giving the impression that I'm in agreement with her. So far she has not made herself look like a victim in regards to me. She seems to be following the recommendations of her IC and has basically said, "I'm unhappy so I've left. I don't think our problems can be solved. It's not Dad, it's me."
She has been serially unfaithful over the years in one way or another (PAs, EAs). Her PA that I know about involved her lying to all of us for years about going grocery shopping, running errands, etc.... which all involved her leaving me and the kids at home so she could meet OM; sending the kids to grandparents while I was away on business so she could meet OM; etc.
She knows she can't throw me under the bus (for relatively minor personality conflicts and behavioral, typical relationship issues...minor league compared to her lying and infidelity) without throwing herself under a bulldozer if I choose to reveal her dirty laundry in an effort to defend myself.