IENF-414 King's Game with my female student sisters and me as the only guy

When I got home, my high school sister was having a girls' night out with her friends. The friends were excited to see their older brother. Soon the conversation turned to sex and they decided to play King's Game. The naughty commands escalated and the flesh of her tight body was irresistible! I couldn't show my sister this messy appearance with my nose hanging down! What? I never thought I'd have sex with my sister in front of my friends!?