Marrying a girl while doubting his sister by breastfeeding breastfed this girl's father

Q: I was breastfed with a woman whose friend would visit her and leave her a baby boy at her home. When this friend would come back, she would find her baby satisfied as if he had been breastfed by my foster sister. However, when we asked my foster sister about it; she denied that she had breastfed the baby. This happened many years ago as the concerned baby boy grew, married, and had a daughter. My question is whether it is permissible for me to marry his daughter or not? (Part No. 21; Page No. 56

A: If the reality is exactly as what is mentioned in the question, that your foster sister denied that she had breastfed the baby boy in question, it will be permissible for you to marry his daughter. This is because the original case is the absence of breastfeeding, and what you have mentioned does not constitute any proof for its existence.May Allah grant us success. May peace and blessings be upon our Prophet Muhammad, his family, and Companions.