Des:My parents remarried and my mothers stepchild, Rika, became my sister-in-law. I live alone, and my girlfriends sister-in-law lives in the company dormitory, so we dont live together, but I was worried about her sister-in-law. One day, when I returned home from the night shift, I found my girlfriends sister-in-law in front of the door... When I invited her to my house, we started having a dangerous relationship where she had lots of sex with me...