Yes, the location unless living in your home doesnt take away your obligation to support the child. In fact, if you have no custody or visitation it actually increases your financial responsibility.
A mother can stop child support in Texas, provided she does not receive public assistance. She must close the case with the Texas AG. Beware, that she can do this and could later attempt to open it again. I would go to an attorney if this is the case.
her choice
The State of Texas child enforcement agency would have it. Sometimes it takes a couple weeks to get to the mother. The state would still have it if they haven't given it to the mother.
There are no applicable laws in any state that says the person receiving the child support must be actually spending the money on the child, so no. However, it could be addressed as an issue of abandonment of the child if the mother is in Texas and the child is in Missouri.
No, 11 years too late, and dangerous. I growing number of relationships with mother are destroyed by these actions when the adult child learns their mother had been lying about getting child support.
2 (including your mother's house)
Sweet Mother Texas was created in 1986.
No, it's two years too late for the mother to file and a year too late for the daughter to file.
Nothing changes regarding child support orders whether it is the mother or the father who is remarrying. The child/children are the responsibility of the biological parents not a new spouse. For example if the mother marries someone of substantial means it would not affect the child support amount that was ordered to be paid by the biological father, as the mother's new spouse has no legal obligation to support the child/children.
That would depend on several factors, such as how much the father's pension is, how much the mother's income is, etc.
Only the mother has standing to learn that
No.