Thank you.
I think my biggest worry, actually my only worry about exposure is that his family (they are a big family and I love them all. They are like my own family) would turn against me. Thinking rationally, they know me very well and if I explained why I did it, and more importantly, that I will be indulging in no more crazy, then they will understand. They have said that they would like us to get back together again.

Ask them to support your marriage by putting pressure on your WH to end his affair.

I
Some are supportive of this (sisters in law, cousins - all women) his brothers, not so much. His parents have said it will be a long time before they meet this woman although his dad is the friendliest guy on earth and he won't be able to help himself being nice to her even though he thinks his son is behaving appallingly.
I've done everything I can do - I can only wait and see now

Well, I did the exposure. FIL had a strongly worded talk with him (My in laws are totally on my side)
but he doesn't seem to care. I guess I will just have to give up on my marriage and accept it is over.
I cannot imagine why someone would not see the warning signs of a man who has left not one family broken but two. Also he's been telling ow that both his exes are psycho.
How does she not see something not quite right in this???

Who did you expose to on OW's side?

UPDATE
I met with ow's ex yesterday. It was Illuminating to say the least. It turns out that she thought me and my hubby broke up in January (when in fact we were still together when they started seeing each other) and also it seems that he has failed to mention two of his kids. He had two kids with me that she knows about and two kids with a previous partner which she doesn't know anything about. It turns out that she really doesn't like kids at all so me telling my hubby that she couldn't meet them may have worked to her advantage. I do wonder how long this relationship can go on built on so many lies. Also she hates confrontation, can't cope with reality at all and apparently if I was to confront her she would crumble in seconds. Not sure what my next move is? I've been totally NC since I started plan B - It's working really well for me. I did accidentally see him today as he rode past my car as I was driving. He's looking pretty terrible!