The Reluctant Widow [1950] [DVD]

Jean Kent arrives at the manor to become a governess for its small child, but finds she has arrived at the wrong place. On the journey to her rightful post however, she is sidetracked into the web of intrigue that veils the family and, before the night is out, is a part of it herself - marrying one of the boys on his deathbed and an hour later becoming a widow - and owner of the manor.