The ramifications of some of those choices have been bad enough for their cousin, who never had plans to do much with her life anyway; for an ambitious and highly capable kid they could be disastrous.
My teen mother cousin apparently outsourced her child-rearing duties to her parents.
So that's one solution to the problem. Things seem fine for her, as far as I know. I guess her parents already raised four girls, so raising an extra one didn't seem to be a problem.
My current thinking is that law school, with it's associated six figure debt and poor job prospects is actually a poorer life choice than teen pregnancy.