I agree that you should do something VERY nice for yourself right now. You acted with integrity. Hold your head high. You are doing a very courageous thing ---- you are not walking away from your H now, in his MLC, any more than you would walk away from him if he had a terminal illness, or dementia. Your D is watching. You are setting a WONDERFUL example for her.
Clearly, things are not rosy in ow's world. Step aside for now and let H get his fill of her depression and mood swings. I can tell from your posts that you have a gift for making people feel special. Whenever you respond to posts, you direct your comments specifically to each individual's comment and make us all feel special. I imagine that you did that for your H for more than 36 years. I doubt very much that ow does that.....or even has the ability go do that over the long term. H will figure that out at some point, and when he does, he will regret his actions. In my case, I think that my XH is FINALLY realizing, 6 months post-divorce, that I am not the source of unhappiness he imagined me to be (XH and I played table tennis for 2 hours tonight and he accepted my invitation to go kayaking sometime soon). Continue to conduct yourself with the integrity and class that you have always shown. Your H will see the light at some point and you will have peace that you conducted yourself with grace and integrity. This will be a more powerful lesson for your daughter than words could convey.
I know that you feel down after this session today. Many of us have been there and understand......but there is a BIG positive coming from today's C session. That is that there were no BIG surprises. When H asked for a counseling session, we all wondered if he had some kind of bomb to drop in the session. It sounds like he did not. So that is a BIG positive.
Onward Mila. We are all here for you sending positive thoughts your way.