This is an amazing story. I'm not going to go on about the morality of this marriage. Different strokes, ya' know. Do you realize that if this young girl lives very long, the combined span of a husband and wife could be almost two hundred years? That would be like from the French Revolution to the Moon landing.
The passage of time is not so pronounced in Somalia. It's the same there as it was in the Stone Age. In another hundred years it likely still will be. It won't happen anyway. They'll probably kill her and bury her with her husband and women don't live too long there in any case.