As I turned 18, I found myself increasingly attracted to the idea of taboo family sex. My step-sister was already an experienced slut who enjoyed sucking cock and eating pussy, so when she suggested we watch our parents fuck one night, I couldn't say no. My heart raced as I spread my legs wide open for my step-sister while our step-father pounded into my step-mother's wet cunt right in front of us. The sound of their flesh slapping together only made me wetter between my thighs; When step-Dad finally grunted loudly signaling his own climax inside step-Mom's womb, my slutty step-sister quickly moved between my legs and licked away at the sweet nectar dripping from my 18 year old snatch. As she did so, I surrendered fully to being a bisexual taboo slut.