Overboard(1987)

Snobbish heiress Joanna Stayton hires carpenter Dean Proffitt to construct a huge closet on her yacht for her lavish wardrobe. Dean completes the project, but when Joanna learns that he failed to use cedar as she wished, she refuses to pay him for the job. Some time later, Joanna falls overboard and is struck by a boat, giving her a case of amnesia. When Dean sees the story on the news, he concocts a scheme to pretend that she is his wife, Annie. Believing that she is Annie, Joanna moves in with Dean and becomes mother to his four unruly boys, a role for which she is quite unprepared and totally inept. But with time, she adjusts to their routine and begins to love the family. So when her real husband finds her and she regains her memory, she has to choose between her old life of privilege and her new middle-class one.