Just my worthless opinion.
They aren't ready to handle a kid. They're not mature enough, nor
have the right attitude, nor reached a level of responsibility to
look after one. Yes, its wrong to rid a life, its heartless, its
just not right. But then again, if the child was born, can their
marriage solve anything? If the girl does find someone else alot
more willing to take up the responsibility, that would be good, but
remember that's still a big if.
I'm not taking sides on any basis, just my opinion. Cheers.