Yes, if you feel the need to not support your daughter and take away from her.
No, absolutely not.
see link
Yes.Yes.Yes.Yes.
A childs mother must file a petition for child support in the local family court.
If she is married, no. If she is unmarried, yes.
No.No.No.No.
Request an enforcement action from child support enforcement.
No. The father of the pregnant daughter has no legal obligation to support her child. That responsibility belongs to the biological father of the unborn child assuming that the pregnancy is not terminated nor the child placed for adoption or parental rights terminated by the court.
No.
Let him owe child support you will find out real quick
The daughter of your father's daughter is his granddaughter. She is either your niece, or your daughter.
If you're in the US, marriage automatically emancipates a minor and therefore the parents are no longer responsible for supporting them, so, no, child support does not continue. The noncustodial parent needs to file a petition to have the child support terminated.