We couldn't adopt a child, so we decided to foster.

A foster mother is a mother who takes someone else's child into her family and cares for the child for a period of time just as what she would do to her own child.

In our human society, when a child's parents meet their unfortunate deaths for a certain reason or reasons, or its parents become too sick to look after it, this child will have to find a foster family, especially when it is a baby or at a very young age.