A - Thanks for the question. First let me tell you what the Church does not teach. The Church does not teach that the girl is at fault in any way, shape or form. The Church does not teach that the babies are any less valuable than their mother. The Church does not teach that the father should not be punished - in fact, the Church teaches that it is an act of justice to punish him in jail.
What the Church does teach is that regardless of the situation surrounding conception, we all have the inalienable right to live our lives without others killing us. None of us gets to choose to come into being. Neither do these children. Is it risky for the mother to keep them? Yes. Will she have deep wounds that will need a lifetime to heal from? Yes. But, there is no reason to kill. None. In fact, she will have even more regret and pain if she decides to kill her babies.
No baby deserves to be killed no matter the circumstances surrounding how the life came to be. Think of Mary, who was young and unmarried. In today's society she would be told that keeping the baby would ruin her life.
I can also guarantee that God loves the children much more than any of us ever could. They have a purpose to their lives, just like you and I do and it is possible to support both baby and mother.
"All human beings, from their mother’s womb, belong to God who searches them and knows them, who forms them and knits them together with his own hands, who gazes on them when they are tiny shapeless embryos and already sees in them the adults of tomorrow..."The situation in life, the pain that others feel, the evil that is perpetrated on someone, the situation surrounding conception, and any other reason does not negate our inviolable dignity. We cannot kill the innocent.
-(Pope John Paul II - The Gospel of Life, 61).
I hope this helps.