That depends on individual state laws. see link
It either ends when the child is 18 or the child support agreement would say otherwise. Legally he has been on his own for years.
No. The support order has your son's name on it, so it only applies to him.
no unless he can not support the child
It is not your son's money, it is yours to help pay for his support. Unless you are restricted by court order from spending the child support money on only specified items, you may use the support money to do whatever you want with it. NOTE: It would be a better lesson, if you made HIM pay his own ticket!
Depends on your state laws and what your child support agreement says but you have to pay at least until the child is 18.
I do not think so. You do not have to pay child support in any state if anyone is over 18.
I doubt your son will buy his own food, pay the rent, etc to support himself. All that living expenses is what the support goes to. It goes to the adult who pays for him so no.
You will have to pay child support only after paternity has been established either by presumption (i.e., you two were married at the time), your acknowledgment or genetic testing.
It depends on the jurisdiction, but it is likely that the grandparents are required to pay child support until the child (father) reaches adulthood. Until then he, and all his actions, are your problem.
see link
no
no