It's not really spoken about publicly, so we can avoid having a discussion about the things Mohammed actually did in his life. She was his friends daughter, and his friend wasn't keen, but Mohammed used his power to talk him in to it.

That's the final messenger from god, right there.

That's why the age of consent has been so low in many Muslim countries - although this is now being addressed bit by bit. In Yemen, for a long time, the age of consent was 9.