Is it permissible for the daughter of a maternal aunt to marry a man whose brother nursed from her mother?

If you were suckled by your maternal cousin's mother, or she was suckled by your mother, or you both shared suckling from another woman, then she becomes your sister through suckling, and it is not permissible for you to marry her. However, if there is no reason for prohibition, then it is permissible for you to marry her. It is stipulated for prohibitive suckling that there be five full sucklings.