My 20-year-old sister asked me if she wanted to have her first drink with me! What a capable sister (tears). I was enthusiastically teaching her how to drink alcohol, but...huh? Something was wrong? My usually shy sister got horny when she got drunk and started relentlessly wanting my dick! I thought it might be a little dangerous, but then she woke up to a full-fledged nymphomaniac awakening!? She was forced to penetrate me, and she changed so much that she even asked for the forbidden creampie! I was planning to teach her how to drink like an adult, but I ended up teaching her how to have sex like an adult...