Hey NH - just letting you know that I am still keeping up with your story. I don't have any advice (not that I ever did), but do feel for you.
That crap (the sexy dressing) doesn't kill me as much as it used to, but it is impossible not to notice it. and if you called it out, you would be accused of being controlling - (I can't even wear what I want to anymore?)
I try to avoid seeing W before she leaves so I don't have to be a witness to it.
And what you said earlier about ---"If I pull the trigger and leave the marriage, I'm the bad guy who gave up on her and broke up our family. If she pulls the trigger, then I'm the bad guy who treated her badly and made her want to leave"---I feel this exact way, but I don't feel that there is going to be any motion unless you create it.
Me-45 W-44 S21, S18, D15 T-27, M-21 BD Jan 2014 PA revealed March 2014 In-house separation - April 2015 I filed - Aug 2015 She moved out Oct 2015