Your marriage to someone who is not the father of the kids should have no effect on your right to child support from their father.
If you're living together with the child, no; in such a case, get an order terminating support and setting the arrearage or stating that no arrearage is owed.
If he's paying child support yes.
Marriage is an emancipating event. Generally speaking, child support terminates upon emancipation. So, if you want/need the child support to continue, he better wait until after graduation to marry.
He should return to court immediately with proof of the marriage and residence with you and request a termination of the child support order.
No. Only the parents support the child, not the step parents. What you make will have no impact on how much he has to pay in child support. Even if you marry this woman that will not change.
The father of the child is responsible for supporting the child until it is at least 18 and through high school. Usually a court order sets the amount. The only possible exceptions would be if the support is not ordered or if the child is adopted by someone else.
no
It probably goes away--he may want to file with the court. Remember, if you have not resolved the issues that broke you up the first time, or if there is lingering resentment on this issue, your new marriage is doomed.
The grandchild of your father's first cousin and your child (your father's grandchild) are third cousins to each other. In the US, no jurisdiction prohibits such marriages.
I believe that depends on what state said teen parents live in...
absolutely
no