As an exam student, I decided to spend my summer vacation at my uncle's house in the countryside in order to concentrate on my studies in a quiet environment.I heard that my uncle has a younger beautiful wife, but when I actually met him, his wife, Yuri, was a plump, busty beauty with too much stimulation for me, a virgin. I react involuntarily.And that night, I woke up in the bathroom and looked into Yuri's SEX straddling her uncle and shaking her waist, but she met Yuri's eyes.