In this adult role-play, my 20-year-old sister asks to share her first drink with me. While I enthusiastically teach her how to drink, my normally shy and serious sister begins to change: alcohol gives her a lustful look and makes her obsessively crave my cock. Before I know it, she forcefully takes me inside and becomes so uninhibited that she even begs for a forbidden creampie. I meant to teach her how adults drink, but end up teaching her how adults fuck.