Итак, выходить замуж в 9 лет видимо все-таки нельзя.
Правда разводиться можно.
A man who divorces his wife must be adult and sane, but if a boy of ten years of age divorces his wife, precaution must be exercised. Similarly, a man should divorce of his own free will, therefore, if someone compels him to divorce his wife, that divorce will be void. It is also necessary that a man seriously intends to divorce; therefore, if he pronounces the formula of divorce jokingly, the divorce will not be valid.
If a man has sexual intercourse with his wife during her Pak period, and then wishes to divorce her, he should wait till she enters into Haidh again and becomes Pak. But if the wife has not completed her ninth year, or if she is pregnant, she can be divorced after the sexual intercourse.
A wife who is under nine and who is in her menopause will not be required to observe any waiting period. It means that, even if the husband has had sexual intercourse with her, she can remarry immediately after being divorced.
If a wife who has completed nine years of her age and is not in menopause, is divorced by her husband after sexual intercourse, it is necessary for her to observe the waiting period of divorce.
http://www.al-islam.org/laws/divorce.html