my 20-year-old sister wants to drink alcohol with me for the first time! what a grown-up little sister (tears). i enthusiastically teach her how to drink, but something seems off? my usually shy sister turns into a slutty face when drunk, desperately wanting cock! i thought this might be bad, but she fully awakens as a nympho? she demands insertion and even creampies! i intended to teach her how to drink like an adult, but ended up teaching her how to fuck like an adult….