Does a sister's son become a son through breastfeeding if he suckled from his maternal aunt once, then left her, then completed four separate breastfeedings, knowing that one of the feedings caused him to vomit, and that the mother was pregnant during the completion of the breastfeeding, and the infant had not yet completed two years of age?

If an infant, within its first two years, breastfeeds five times from a woman, she becomes its wet nurse. This applies whether the child breastfeeds directly from the breast or drinks the milk from a container. The nursing that establishes prohibition is that which is distinct from another. So, if the child breastfed four times and took five breaths with each feeding, the prohibition is not established, according to the preponderant opinion, until each feeding is distinct. However, if the milk is drunk from a container, it is considered five feedings if consumed at five different times, and it is considered one feeding if consumed at one time.