Damn! You're like a wet noodle with no backbone. C'mon!
When your W starts to talk about the OM, put up a hand and say, "I will not listen to you talk about the OM for it is very disrespectful to me as your husband." Walk away.
When W tries to mosey up and cuddle on the sofa, gently remove her hands/arms from you and then move to another chair.
You MUST draw a line in the sand to convos about the OM...OMG, even talking about sleeping with him to your face!!! Where's your backbone, Rzr.
There's a time to listen and a time to be very firm.
Seriously, I don't understand why you've postponed your bike trip to Austin for you were really looking forward to it. I am wondering if you're using work as a cop-out when in reality you're doing this for W since she's made the moves on you.