The mistake she made is a common one for girls, particularly poor girls, whose families have been pulled apart thanks to progressive dogma. They are often raised in single parent households themselves, they have seen women devalued all their lives, they have heard that "all kids have sex from a young age" all their lives and think that's what is expected of them. They've never seen any control exerted over the human condition..their families don't attend church regularly, they scoff at the idea that marriage is a sacrament, and should take place before having sex. In fact, many are raised in households where they are told it's best to *try someone out* before making any sort of commitment, and if you don't like them, then on to the next.
Often these girls are abused by older men who come in and out of the lives of their own mothers, which makes them easy pickings for abusive and manipulative men all the rest of their lives. All this dabbling in unhealthy, multiple, sexual relationships means they aren't focusing on things like education and earning a living, and thus they are further hindered by the fact that they have limited skills and are more ignorant than their peers who are raised in households where it isn't *accepted* that kids have sex. They are so used to having the state take care of everything, and they have heard so many times that if they get pregnant, someone will either support them, or they can easily get rid of their babies, that they really don't worry that much about things like birth control.
They desperately cling to their babies not just because they get a check for it, but because they do love their babies, and the love they anticipate from their kids is often the best and most fulfilling love they will ever experience. Sadly, it's not such a hot situation for a child to be raised in an environment like that, where they exist to provide something to a needy, confused, and desperately poor parent, but there you have it.
That's the lifestyle that progressive ideology fosters, and that's the lifestyle that these poor girls are sucked into when raised in the midst of it. It's pitiful, and it's unhealthy for them and their children.