Hindle Wakes

While on seaside holiday with her girlfriend Mary, a pretty factory worker named Jenny is attracted to Alan, son of the owner of the mill where she works. When she agrees to spend a week with the young man, Jenny enlists her roommate's help to keep this liaison a secret. The conspiracy backfires when Mary is killed in a freak boating accident, revealing that Jenny was elsewhere. Both sets of parents learn of the liaison, and insist that Alan "do the right thing" by marrying her. (imdb)