It's wrong to steal your friend's significant other
Jennifer thinks her friend Wendy's boyfriend is cute and is surprised he has a twin brother.
Jennifer wants to date someone.
Jennifer flirts with Wendy's boyfriend's twin brother who asks her on a date.
Jennifer flirts with her friend Wendy's boyfriend until he breaks up with Wendy and dates Jennifer.
Jennifer enjoys dating and Wendy is happy her friend is dating someone she knows.
Jennifer and Wendy's friendship is destroyed, leaving Wendy feeling betrayed.