Son is the person that God lent us to do an intensive course, how to love someone more than ourselves, how to change our worst faults to give them the best examples and, from us, learn to have courage. Being a mother or father is the greatest act of courage that someone can have, because it is exposed to all kinds of pain, mainly uncertainty to act correctly and the fear of losing something so loved.
It was just a loan ... The most precious and wonderful loan since they are ours while they can not fend for themselves, then they belong to life, to destiny and to their own families.
God always bless our children, because he has already blessed us with them.
Just saying...