last bore that relationship

It may well be that ordinarily a foster relationship does not begin until natural parental ties, realistically viewed, are severed; if so, the foster parent bears the parental relationship when the natural parent has ceased to be such in truth and fact. And in that case, the clear intent of the 1942 amendments would demand the exclusion of the natural parent from participation in the proceeds.

Defined by the Supreme Court in - United States v. Henning, 344 U.S. 66 (1952).