Wedding in White

Wedding in White is a movie starring Donald Pleasence, Carol Kane, and Doris Petrie. A father will do anything to protect his family's reputation when his unmarried teenage daughter becomes pregnant because she was raped by her...
A young girl's brother comes home from the army, and brings an army buddy with him. The three of them go out that night to celebrate, and after much drinking has been done, the brother's friend rapes the sister. After the two men have gone back, the girl finds that she's pregnant--and discovers that her parents don't blame the soldier, but blame her.