Is it permissible for Hayat to marry Abdul Aziz, knowing that Abdul Aziz's paternal aunt claims to have breastfed both of them?

If the suckling was merely one or two suks, then there is no objection to Abdul Aziz marrying Hayat, for the suckling that prohibits marriage is five sucklings according to the more preponderant opinion. It is not a condition for the prohibitive suckling that they both suckle together; rather, it is sufficient that they both suckle from one woman.