oh geez, sorry I have been absent from here for few days looks like I missed a ton!
I don't have a lot of time but I want to chime in. In my opinion (for what it's worth) I would not suggest letting him stay there with the kids for the night. I think it will do him good to have to figure tonight out on his own.
I will type more later. Hang in there NM you are stronger than you think (and smarter than he realizes).
Me 54 DS19 and DS17 Married 06/1989 Divorced 01/2011