I'm curious as to how you managed to have your autistic child, all by yourself. Where there is a child there is surely a mom and a dad. Otherwise there would be no child. If the child's father is alive, he should be helping to support his child. If he is no longer living, the child should be drawing SS funds to help for his needs.
I assume that your MAP is older than your 36 yrs since he is your mother's best friend's husband?
It IS tough to find private places to have such liaisons and I assume you two were caught somewhere that did not have a door that locks?
How long is your affair been going on?