The N is back

I have had a few days from hell. My n is back to pack things up and help get the house ready for sale, and get divorce rolling. He lives out of the country and is in town for a week. It is extremely difficult to see him and deal with him. With all the counseling and stuff I have read it is still hard to see such an empty person. His total lack of emotion is bizarre!!! This is my first divorce so I am not sure if this is normal but I am thinking it is not!
He is being nice, as usual, and plans to be "generous" with the divorce which is fine but this is such a bizarre situation. His kids are around cleaning there stuff out too and I am just so ready for this to be over. He wants me to bite my tongue around his kids and not drag them in and it is hard. The have total hero worship of their father and he will continue to buy their love. They are his constant supply. I guess what hurts the most is that I am dealing with emotions and he has already moved and moved on. It has only been barely 3 months!!!