What should a husband do about his wife’s wedding photos from her first marriage, which are in her family’s possession and difficult to get rid of, especially given his concern that they might fall into the hands of his children who are about to marry?

The wife must dispose of the pictures if the husband requests it, and she can destroy them without considering her family's anger. If she is unable to do so, or if disposing of them leads to a greater harm, then the husband should excuse her. There is no danger if the pictures fall into the hands of the children; the matter is easy as long as the pictures are kept away from the hands of non-mahram (definition) men.