Yes, she has been around. I asked my h about her and he said they were 'very good friends'. It was after I confessed to knowing about her that he said he couldn't carry on back in May. I don't know if it was this or a culmination of other stuff.
It wouldn't be a deal breaker but at least I'd know what I ws dealing with. I hate her though, I want her to go away even if they aren't together. I just don't know what is going on and that is what I find hardest. On the other hand, if H turned round and said he was in love with someone else I'm not sure what I'd do!
Seeing things like this just makes me physically react. I feel like I've been punched. I hate that she is in contact with my SIL when his family are ignoring me.