Is it permissible for a father to photograph the mother's grave for her daughters to see at home to supplicate for her and recite the Quran, fearing the presence of men at the grave who would prevent their visit?

It suffices to supplicate for the mother, pray for mercy upon her, and give charity on her behalf, without the need to visit her grave. Indeed, some scholars have deemed it unlawful for women to visit graves. As for photographing the grave, it is something that should not be done, as it leads to attachment to graves, and it is a matter of curiosity and futility from which there is no benefit. It has been stated in the Hadith: "When a person dies, all his deeds come to an end except for three: ongoing charity, beneficial knowledge, or a righteous child who prays for him."