I guess what I'm asking, in a nutshell:

It was her idea to live separately, she says she misses me, but obviously that's just a bunch of hoo-ha... as she's staying with OM.
Should I discuss with my W that I know she is still seeing OM?
If so, what is best way to approach?
If not, why not?

Me: 43
W: 44
Married: 13
ILYBNILWY: 03/2011
OM: 31
Living Separately: 01/01/12