I have been searching for many years for a movie. A corporate (maybe banker) father of 2 teenage daughters. The oldest (18-19 maybe) begins working at the fathers office and becomes involved with an older (20-ish) man. She continues to act and dress like a teenager in bikini and such. It is a secret and they also secretly get married as she is pregnant. The end of the film shows the oldest dress very grown up and professional looking and younger sister hanging with boys in a bikini at a pool, possibly in their back yard. Father and daughter are all brunettes. I do not recall a mother in the movie. I believe I watched it with my older sister at the age of 4 or 5 yrs old. I was born in 1963. Please help, I have asked everyone I know! For years! It is driving me a little nuts haha