Literal Meaning

One who is not the child of the suspected victim (of a wild animal's attack) will say,'let us wait until day break'

Implied Meaning

Issues of parents are of greater concern to their biological offspring as compared to their stepchildren

Origin

At the time of anxiety about a mother's whereabouts, and a readiness to mount an immediate search for her, someone who is not her biological child will be more concerned about his sleep,and will attempt to postpone the search until following morning