Regarding your H not wanting your son to stay over night with you. My ex does the same stuff. In my situation, it is because my H cannot be alone. He actually panics when he is by himself. This is because he will then have to think about what he has done and face his demons. He bribed my son into staying with him (offered him a car.) Ex expected me to go gonzo over all this. I did not. I was very calm and did not fight it at all. My son comes and visits me most everyday. I do miss him at night though. They are like little babies who have separation anxiety.
Me: 46 H:44 Together: 25 years Married: 20 years Separated: 11-30-06 Divorced 12-21-07 OW: EA began 2005 PA began end of 2006 3 children,20, 16, 6 ex asked for forgiveness 01/16/11