The Summer I Slept With My Boyfriend's BrotherEpisode 9

During their final summer before college, Lily is devastated to discover that Finn, her boyfriend of four years, is having an affair with her best friend, Serena. Following a head injury, Lily seizes the opportunity to fake amnesia. To clear the way for his new romance, a selfish Finn absurdly convinces Lily that his older brother, Connor, is actually her boyfriend.