It's Been A While Since I've Been Back Home, But My Parents And My Older Brother And His Wife Live Under The Same Roof, And Their Situation Seems A Little Strange...

I started living alone when I entered university. After various things happened, I decided to go back to my parents' house for a change of pace. I felt something strange about my parents' house after so long. A few days later, I witnessed a sight I couldn't believe. My mother and older brother, and my father and sister-in-law, were each having sex!!