Patsy (1921)

Patsy is the awkward sister of the lovely Grace. She is also in love with Grace's boyfriend. Mother shows favoritism towards Grace, and father is too accommodating to stand up for Patsy, although he knows she is picked on. When they are all at supper, Grace runs away on a motorboat with a millionaire playboy. During a deep talk with Grace's boyfriend, Patsy reveals that she is in love with somebody who doesn't know she exists.