If a 16 yr old girl has a baby by a 16 year old guy and keeps it, who pays child support?

If the 16 yr old girl lives with her mother only because her parents are divorced, and her father is paying lots of child support, what happens when she gets pregnant and has a child by another underage teen?? Then who pays child support for the infant? The teen father is underage so it wouldn't be him. Would... show more If the 16 yr old girl lives with her mother only because her parents are divorced, and her father is paying lots of child support, what happens when she gets pregnant and has a child by another underage teen?? Then who pays child support for the infant? The teen father is underage so it wouldn't be him. Would it be nobody? The teen boy's parents? The teen girl's father? Who?
Update: The state is California.
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