Ok, I feel like I keep asking for advice, but I guess that's what this place is for, right?

How do I forget how nice he was and how cordial it was over Christmas and go back to going dark and not being around each other? I allowed him to be around us for daughter's sake and Christmas, but tomorrow night he comes home again from his brother's and I want to make sure he understands that was just for the holidays and now it's back to his real life, the one where he's having an affair and needs to be in another room? Or do I just make the effort to walk out every time he's around?

I know dinner will come up tomorrow and what I had planned. I made lasagna. Do I just tell him to take some downstairs? UGH. I've obviously been thinking a lot these last few days...