My own experience with ex-H colours my view, so I thought I'd run it by the court of MN.
I've been friends with another single mum from school for a couple of years now. I went out with her on Sat night & she obviously thought we'd got to the stage where she could confide in me.
She told me that she has been having an affair with a married man for 6+ years. She doesn't want him to leave his wife (& DCs) and it sounds (from her) as though he doesn't have any intention of doing so. She says that she is saving his marriage, because without her he would have left years ago. Obviously there were hours of chat, but that is the bones of it.
This has to be wrong doesn't it? I was stunned, as she doesn't strike me as the delusional type - let alone a husband shagger.
Oh, I did ask her what she got out of it & (as a brief summary) she said lots of great sex & a close friendship she values.
Maybe I need to have a more French view of life - perhaps it is fine? It has completely changed the way I see her. AIBU?