I would read to see how other people have been successful with LRT while living in the house. I will be honest in saying that I tried and failed miserably at it. It came across as angry, distant, etc.
LRT worked so much better for me when my W moved out. We didn't HAVE to be around each other and pretend anything. I didn't know what she was doing and she didn't know what I was doing. We only saw each other when custody changed and only talked about the kids.
Have you ever thought of just letting OM's S do what she thinks is best for her, and you do what is best for you?
What is the evidence going to do for you? You know you aren't crazy, you know she is having an A, she knows you know. I had evidence of the affair and the only thing I used it for was to protect myself. To this day the only copy is with my lawyer. I gave it to her to ensure that my W didn't get any alimony. I was looking out for me, not using it to be vindictive, not throwing it in her face.
I am not telling you what you should or shouldn't do. Just think about what it is you want in the long run and what steps are you going to take to get there. Look down the road, if what you do today impacts your ability to rebuild your marriage tomorrow then don't do it no matter how much you might want to get even.
M 33 | W 34 | Kids: S4, S3 M: 5/28/05 Bomb: 8/22/09 EA: 8/1/09 | PA 12/26/09 W L: 10/21/09 M L: 11/16/09 | 12/09 to file SA W & Boys Move Out: 3/14/10