The World Federation One Stop Fiqh

Ruling 2397

If a father or a paternal grandfather marries his non-bāligh son/grandson to a girl, then once he becomes bāligh he will have to pay for his wife’s living expenses. In fact, even before he reaches bulūgh, if he is of an age when he is able to derive sexual pleasure and his wife is not so young that her husband cannot derive sexual pleasure from her, then in such a case, her maintenance (nafaqah) is his responsibility. Otherwise, maintenance is not obligatory (wājib) on him.