Given the situation, with OM's own imminent divorce, maybe it is irrelevant, but don't let your WAW's potential $h!t storm deter you from doing the right thing.
In my case, OM had everything to lose and while exposure hastened my W's decision to file it killed the EA dead in its tracks one OM understood what was at stake. My W was/is in a such a fog that she basically viewed me as concentrated evil afterward.
CABBR
M:49, W:47 M:22,T:23 S9, S6 W probable MLC Bomb: 4/09 In-house separation and Separate bedrooms since 4/09 EA busted: 7/09 W filed: 7/09 Kids unaware of D filing