My mother breastfed my maternal aunt’s daughter, but she does not know how much she breastfed her. Is she considered a mahram (a relative one may not marry) to me?

Question:
May Allah grant you success. The questioner says: My mother (may Allah have mercy on her) breastfed my maternal aunt’s daughter, but she does not know how many breastfeedings she gave her. She breastfed her for three days. Is my maternal aunt’s daughter a mahram to me?

Answer:
Since the number of breastfeedings is not known, out of caution, she is not considered a mahram to her, out of caution. Yes.