What is the ruling on a wife expressing a quantity of milk and freezing it to breastfeed an infant orphan upon his arrival in a few months, knowing that her milk does not last more than two months?

The majority of jurists hold that fosterage prohibition is established if an infant drinks milk expressed from a woman, provided that the child is less than two years old and consumes five satisfying breastfeeds. So, if a wife expresses her milk and breastfeeds an orphan with it five times while the orphan is within the age of infancy, then the orphan becomes forbidden to her (for marriage).