Well, I think there were a lot of factors that contributed to getting to piecing for me.
I was able to stand my ground that I did not favor a S or D, so if H decided on either of those things he would have to take full responsibility to the kids and anyone else. So, he never left the house, which helped. I did kick him out of the master bedroom though, when he failed to tell me he had resumed the R with OW in Sept. after they broke it off at one point. I also set other boundaries... that only applied to my sitch with him living there. I tried to GAL and do 180's that fit for me. I focused on the kids and myself. I stopped pleading, begging etc. I tried to be polite, distant, but cheerful when I communicated. I never went dark. But, I would have if he would have moved out. You can read back on my old thread if that is helpful, there is a link to it on my piecing thread.
Don't forget, each sitch is unique. What you are doing with LRT seems to be the right approach for your sitch at this point IMO.
