Newbie Error- LRT too Soon- help!

[Bart42]

So what does mdu say? 1 step forward, 1000 steps back- well that was my Saturday night. GAL'ed all day, ran errands, and other than D's sporting event, had little contact with W. Came home, put on a football game and cooked a nice meal for the family. After dinner W shifts the conversation to her work and I validate her choices about going for a big promotion and offer some thoughts to consider when she develops her strategy. Nice conversation, I don't let it linger too long and I end it and start cleaning up. W says "thanks" and goes to give me a kiss, so instead of allowing that I turn and peck her on the cheek and walk away.

Then W's phone rings and it is OM. This is pretty ballsy and they always txt- he never calls her when she is home. I at least resist the urge to answer the call myself, but I show her her phone and she scurries into the other room to take the call. Apparently they didn't talk because she comes right back out. I try to play it cool by going to our room to try and relax instead of starting an argument, but w follows me and starts some BS story about how it was probably OM's Girlfriend using OMs phone. We start getting into the whole I state facts she denies pattern, which sucked and I wish I didn't go there. After a few minutes though I pull it back to "you need to end A, and I told you I will give you some time, but things like this are drastically shortening my ability to give you that time." Then I walked away and we avoided each other for the rest of the night. Lousy night sleep where my PMA disappeared and the demons came back- hate being back in that place.

In typical fashion, this morning it's like nothing happened last night. Complete avoidance and denial. I'd like to say "I will not tolerate OM calling you when you are in our home" but it's a weak boundary that she can't control and it's not like I'm going to pack my bags and move out the next time her phone rings and it's him.

I'm confused on whether I should be bringing this up again to set a boundary or letting it slide and not saying another word in true "as if" fashion- I made myself clear last night so not sure bringing it up again to set a weak boundary is the thing to do.

Anyway I've got about 4 hours to decide as I'm flying out this afternoon for a 4 day work trip, so contact will be limited with w for most of the week.