The younger sister took her fiance, who was about to laugh at her, home to play. As soon as she entered the room, she pulled down her boyfriend's pants and gave her a BJ right at the door because she knew the house was empty. Suddenly, her older sister came home and opened the door. I was extremely surprised when that horrifying scene met my eyes. After the three of them sat and introduced each other, the younger sister led her lover into the room to do adult things. The older sister also curiously peeped through the door and that made her lustful. That afternoon, her older sister successfully lured her future brother-in-law into her private room and everyone knew what she did. After having sex in the afternoon, at night the lecherous girl secretly went to her younger sister's room to continue having sex with the young man, even though her younger sister was sleeping. The boyfriend and his sister were discovered by the younger sister, but instead of blaming them, all three of them continued to have sex and were very happy with each other.