JAV Tokyo

My dad remarried to a single mother and suddenly I had a sister. I was not even used to living with four people yet, but my parents went on their honeymoon, so I had to live alone with my sister-in-law. I had to study for my exams, but I couldn't help but notice my half-sister-in-law's huge ass! I was so excited to see her big ass sticking out of her denim shorts that I couldn't hold back and started fucking her right away! I thought I would be able to fuck her, but she refused to have sex with me, so I asked her to pull it out of her mouth for me. My sister-in-law's blowjob technique was so good that when I ejaculated in her mouth, she gulped it down. The fact that she drank my sperm excited me even more, and I couldn't stop getting an erection. During the few days when my parents were away, I had my sister-in-law pacify me and drink my sperm many times while I was studying for the entrance exam!