Firstly i would definitly save one than have both die - thats question is a wee bit silly in my mind. I was pritty much taught that when i started going to early medical classes - i go to college i am 14, but i want to be a doctor, and one of the first topics was dealing with dieing pateints and such ect ect...
Sometimes in life there are those choices, but how often do they happen probably not 1/500,000.
As for saving the mother for the child, I know someone who wished she saved the child instead of her, just because she couldnt live with the guilt of having killed an innocent defensless child.
Its not a black and white issue , ur right, its the issue of having sex and getting rid of any responsibility that may be the result of that, which is an innocent child in which God has blessed you with.
I would definitly die and have my child live, i would leave my husband with a child, and if hes' dead, that one of my many brothers could have the child, or even my parents.
God Bless
Kathleen x