I went to an M-themed sex parlor on a whim and unexpectedly ran into my girlfriend's older sister... Her stunning bondage outfit and devilish teasing made my depravity explode! Then, even at home with my girlfriend nearby, she mercilessly acted like a slut, biting and pinching my nipples until I wet myself! A follow-up male orgasm! Restrained footjob torture! Brutal glans torture!! I was made to cum over and over again in a pathetic state that I couldn't let my girlfriend see, and I was completely submissive! And finally, a reward...