T, she doesnt see him. She sees a shell of the man you know.
The memories he may have of her hold no weight. I promise you that. Their relationship is not built on love and committment. It is a tower of sand. It will matter not.

I can tell you that my xh doesnt remember most of what happened. When I have told him things he said or did, he cannot believe it.

I know it hurts that he let her into your lives. But one day it will become like a scar. Under the surface, but, no longer the searing pain it once was.