Mom Watched Me Bang My Sister On The Backseat: Incest Mind Control 31

A long drive with my family was going to be boring as hell, so I figured I'd use the time to catch up on some studies. I was translating an ancient scroll, and the mystical words had more power than I imagined. Before I knew what was happening, I had an audience with the demon of lust and he gave me his powers so I could have my beautiful sister right there in the back seat!