My wife has a younger sister who is not only beautiful but also has a very good body, she is Suzumiya. On the occasion of completing the graduation exam with quite good achievements, my wife and I took her to the city to play for a few days to help her relieve after stressful lessons. Just met me seemed to have been fascinated immediately by her beauty, the dark thoughts began to appear in her mind despite knowing that it was extremely evil. Once my wife went out, I accidentally saw that she was cooking to reveal her toned butt that looked very stimulating, I was unable to control myself suddenly from behind hugging my body so that she could not react. I constantly have actions touching the sensitive area on my body while she has no resistance to the resistance. That showed that she was also extremely excited, and was given the momentum of me boldly soliciting her to have sex with my wife's back.