My younger sister brought her fiancé to visit me, as soon as they entered the room, she pulled down her boyfriend's pants and gave him a BJ right at the entrance because she knew there was no one in the house. Surprisingly, my older sister came home and was extremely shocked when she saw that horrifying scene. After the three of them introduced themselves, my younger sister took her boyfriend into the room to do adult things, and my older sister curiously peeked through the door, which made her feel aroused. That afternoon, my older sister successfully seduced her future brother-in-law into her own room and did what everyone probably knows. After their intimate moment in the afternoon, at night, the promiscuous girl sneakily went to her sister's room to continue her affair with that young man, despite her sister being asleep. The boyfriend and the older sister were caught by the younger sister, but instead of blaming each other, all three continued to engage in sexual activities and they were very happy together.