I thought I might add my two cents worth here. I kinda did both: I didn't expose the affair, but tried to discuss it with family and friends in regards to helping me fix or repair our marriage, it was mostly my worries I talked about.
I didn't say anything to the W about my worries or thoughts, but just kept what little discussions we had as upbeat as possible.
In the last two weeks, I have discovered that the W has told her mum she is in a relationship with the OW (yes other woman) and stated this talking to a friend. So as far as I know, the W has told the mum and a friend. So much for me being made out as being the big bad person in the marriage, as there is a good chance this affair started even before BD. So it's been going on for over 13 monhts.
My topic if interested: http://www.divorcebusting.com/forums/ubbthreads.php?ubb=showflat&Number=2404278&page=1


ME:51 W:46
M:25
S:22, S:20
Divorced 16/9/15
BD 10/12
W left 12/12 with OW, affair confirmed Nov/12.
Dark since 6/13
I"m in a new relationship since Feb 14.