When your H shows up to see the kids, have everything ready to go (dinner) Wear one of his favorite outfits, the one he's made comments about in the past, smell good and then spend VERY LITTLE time with him. Ask ho wlong he will be staying, then leave. Go run errands, do all of those things you have wanted to when the kids aren't around. Use his mind to your advantage.
Always remember when you get an emotional reaction, it is a clue. Your task is to figure out what triggered the reaction and in the big picture, is it positive or negative. I will guarantee you if you leave tonight when he arrives you will get a reaction.