SSNI-885 Sneaky fuck with lover's sister

There’s no way this will happen. Her sister Lena came to visit at the house where I live with her. The next day, she went on a three-day business trip, and not long after, she returned and said, ‘I’m lonely, so I want to be with you.’ That day was very hot and we were sweating, but our sexual desire was unusually strong. Unable to bear it any longer, I finally made a mistake with her; a forbidden physical relationship began from morning till night, as if she were consumed by her desires.