What are the incest laws in Texas? Can I be put on child support if the child is mine?

You need to talk to a criminal defense attorney before posting or discussing this with anyone else. Texas Penal Code makes isexual intercourse with certain persons with whom you have a family relationship by blood a felony. Regarding the baby talk to family law counsel regarding paternity establishment if that is a place where you should even go or if that is a place your sister has already gone.

The father of the child, whoever it is, should be helping support the child.

Depending on your relative ages at the time, there could be a problem.

You can get a DNA test at the drugstore. It is very basic and you can't take it to court, but it will let you know whether you need to go down this path.

You probably know this already - both you and your sister could probably use some counseling sessions to deal with this.

This answer DOES NOT establish an attorney-client relationship. This answer is based on the limited information provided and is not intended to be conclusive advice. There are likely other factors that might influence or change the advice after a more lengthy consultation.

Incest laws in Texas: Person known to be ancestor or descendant by blood or adoption; current or former stepchild or stepparent; parent's brother or sister of the whole or half blood; brother or sister of the whole or half blood or by adoption; children of the actor's brother or sister of the whole or half blood or by adoption; the son or daughter of the actor's aunt or uncle of the whole or half blood or by adoption.
Tex. Penal Cod. §25.02 A third degree felony.