Which is better: to continue fostering the adopted child in the hope that the wife's attitude will change, or to return him to the care home, and would there be a sin in returning him?

Adoption is divided into two categories: The first is raising and caring for the child without attributing their lineage to the adopter. This is permissible and considered a righteous deed. The second is raising the child and attributing their lineage to the adopter. This was once permissible but was then forbidden by the Quran. If the wife rejects the adopted child and discord arises because of it, there is no sin in returning the child to the care home, for that is better than the child remaining in a turbulent situation, and because Islamic law chooses the lesser of two evils.