HUNTA-197 I chained the door with a chain lock and showed off, then stole my sister's boyfriend! My sister and I are always compared because she is smart and good at studying. She boasted about her handsome and rich boyfriend all the time. Plus, she acts

I'm always compared to my studious and intelligent sister. On top of that, she has a handsome and wealthy boyfriend who she can't stop bragging about. Seeing her act all sweet in front of him made my long-held resentment explode! To vent my pent-up frustrations, I tricked my sister into going out for a bit, locked the door to keep her outside, then seduced her boyfriend and had sex with him. But that wasn't enough; I even showed her our sex act through the chain lock!