My sister came to Beijing with her colleague (boyfriend) for a company event, but they couldn't book a business hotel, so they stayed in my room for three days and two nights and had crazy sex!! UMD-1010

My younger sister and her colleague's boyfriend came to Tokyo for work. Due to the surge in inbound tourists, all the hotels in the city center were full, so they had to stay in my room temporarily... My sister, who was supposed to sleep next door, secretly climbed into the room next to her boyfriend who was sleeping in the living room. Huh?! How dare they have sex in my room?! I pretended to be asleep and waited, but this was going to take way too long!! Huh?! How long was this going to last?! The next day, I gave my sister a stern warning! My sister said that her boyfriend seemed to be a "superhuman". She apologized to me, said she wouldn't have sex again, and asked to stay one more night. My sister went to work first, while her boyfriend was in the bathroom. I never expected that this superhuman boyfriend would masturbate in someone else's house. I yelled at him!! Although he was naked and sitting upright apologizing to me, his crotch was still rock hard, so naturally, we started with oral sex and then had sex!! That night, my sister came back drunk after attending a staff celebration party, only to find that she had already been fucked. My boyfriend, who returned with gifts, found himself in an ambiguous relationship with me...