"I was supposed to have fun with my girlfriend..." Things took a sudden turn when my girlfriend's sister accidentally drank a drink laced with an aphrodisiac! A crazy slut monster was born! She seduced me while my girlfriend was away! Or rather, she was a slut! I resisted in vain, but she was forced to take off her clothes and inserted herself! I realized the effect of the aphrodisiac when I saw her sister showing no signs of calming down no matter how many times we did it! I woke up and had endless creampies from morning to night with my sister who knew no fatigue! I got high on her as she squirted as her body tried to expel the aphrodisiac!