Overboard (1987)

A wealthy, obnoxious woman (Goldie Hawn) hires a carpenter (Kurt Russell) to do some work on her yacht. When the two don't see eye-to-eye, the carpenter is left unpaid, while the woman, Joanna, sets sail. The following day, after falling overboard, Joanna is fished out of the sea. When she is diagnosed with amnesia, the carpenter sees a great way to regain the money she owes him...he tells Joanna she's his wife; that way he gets a free housekeeper and mother for his four kids.