Today's the day I'm going to have her! I've even taken erectile dysfunction medication and I'm fully prepared! All that's left is for her to drink this aphrodisiac and mmm... huh?! Eeeek! My sister drank it?! What do I do... it won't go down... she's asleep too... should I just endure? No, I can't! I want to do it! I want to ejaculate! Here goes nothing! The effect lasts 8 hours! Both of us are burning up with desire! Hard penis! Wet vagina! Rationality gone, ignoring her (my sister) completely, wildly thrusting with no regard in a sweaty, intense pounding!