Sunshine, I said what I said because you still expect "help" from you ex to "raise" your son. It's over. He's an adult and it is no longer you h's job to help you.
Would it be a decent thing for him to do? Yes. But your h has shown repeatedly how cold and cruel he is toward you. Time to change you tack. I don't give a sh!t who calls who, just stop talking to your ex. Period!