Aflah asked the permission to visit me but I did not allow him. He said, "Do you veil yourself before
me although I am your uncle?" `Aisha said, "How is that?" Aflah replied, "You were suckled by my
brother's wife with my brother's milk." I asked Allah's Messenger (ﷺ) about it, and he said, "Aflah is right, so
permit him to visit you."
Sahih al-Bukhari Book 52, Hadith 8