I love to use Tracksy to find out the search terms people are using that yield this site. One recent one came from Japan, and was searched on Google:
if your mother and wife are inside a burning house, who will you save first "you have time to save only one"
I was the third of three hits, though I'm not sure why this collection of words came to me, since I've never blogged on the subject.
Nevertheless, I'm here to help. The traditional answer from the African morality riddle tradition (I forget which people, but it is one of the big three in Nigeria) is that you save your mother. You can always get another wife, but you can't get another mother.