Jami` at-Tirmidhi Book 27, Hadith 8
the Prophet said: "The maternal aunt holds the same status as the mother."
the Prophet said: "Among the most dutiful of deeds is that a man nurture relations with the people his father was friends with."
A man came to the Prophet (ﷺ) and said: "O Messenger of Allah! I have been afflicted by a tremendous sin. Is there any repentance for me?" He said: "Do you have your mother?" The man said: "No." He said: "Do you have any maternal aunts?" The man said: "Yes." He said: "Then be dutiful to them."