My Girlfriend’s Sister

Ken is Yumi’s partner, and he visited her house today to study. Yumi and Ken have a history of being intimate at her home, and today was no different. Ken went up to Yumi’s room and found her seemingly asleep. He proceeded to remove her underwear and fondle her breasts and lick her genitals. However, to his surprise, it was not Yumi but her older sister Yoko. Ken quickly apologized to Yoko and was about to leave, but she told him to continue with what he was doing.