The strength of altruism lies in the fact that altruistic acts undeniably occur in any society and that moral codes universally advocate altruism or benevolence and condemn selfishness.
No doubt he'd been looking forward to the wedding ever since it was announced, as an invaluable chance to cut a figure and do some good public relations work.
Mohammed was not the man to give an exclusive devotion to any one woman, but there is no doubt that, within the limit set by polygamy, he was genuinely fond of his wife and benefactress.