who was involved when the family gets gabriel?

Jonas's father speaks of a weak infant at the nursery whom he is going to temporarily bring home in order to provide better care, since if the baby cannot recover he will have to be released. Lily wants to keep the baby, but Mother reminds Lily that each family unit can have only one son and one daughter.The Elders let this happen. Jonas's family has no control over what ultimately happens to the baby.