"No way this will happen ..." Her sister'Lena'comes to play at the house where I live with her. The next day she went out for a three-day business trip, and soon she came back and said, "I'm lonely, so stay with me." It was very hot that day, and although we were sweaty,'Lena', who had an unusually strong libido, came into close contact and tempted us. I couldn't stand it, and I finally made a mistake, and a forbidden physical relationship began from morning till night as if swallowed by her sexual desire.