I know you don't trust OM and I would say that you need to continue this. However much he stresses he doesn't want your W etc, he obviously has given her means of access to his accomodation so that she can come and go at will. If I was OM's new GF I would be seeing your W off. Something still feels a bit strange about OM and what is going on that end.
I am going to be away for a couple of weeks. I hope things don't get too much worse for you when W returns....although my guess is the sh!t will really hit the fan.
Just remember you have come a long way....it's up to your W to prove herself now....not you.
BTW, I think I go under the name of Saffie on FBook - Sara will know
Saffie me 46 H 46 M in 1986 D20,D18,S16,D13 H's A 01/05 to 07/06 H recommitted to M 07/06 renewed vows 09/06 Going from strength to strength