As I turned 18, I found myself increasingly attracted to the idea of taboo family sex. My 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 sister while our father pounded into my mother's wet cunt right in front of us. The sound of their flesh slapping together only made me wetter between my thighs; When Dad finally grunted loudly signaling his own climax inside Mom's womb, my slutty 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.