I think it's the timing of you coming to the realization she may be with an OM. I did this around BD becasue she admitted to her A when I provided proof. I went through all the same scenarios (like you I don't recommend) but then I found out who most of the EA/PA's were and I unfortunately started to compare myself with them. I don't encourage this one either!!
Also, were you able to check out Brene' Brown yet? Got to go, GAL weekend for me! Have a good one!