I think her prison time got increased after she

broke the conditions of her release to meet up with Vili and get impregnated by him again.

People focus on the aspect of, "If you were a sixth-grader, wouldn't you want to bang your teacher," but you probably have to be a sexually aggressive thug type to make it happen. Her husband was probably more of a nice guy, and that's why he got screwed over when she got bored with him.

If we had early marriage by which sixth-graders could marry other sixth-graders, the problem might be solved. Culturally, it wasn't encouraged even when it was legal, though; people looked at teen pregnancy as a bad thing and campaigned against it, or they said pregnant teens should give up their kids for adoption rather than raising them with the father.