while drinking at my house, my girlfriend passed out drunk. her friend, who i thought was innocent, suddenly turned into a little devil. she quietly straddled me and started rubbing her pussy against my cock, saying, "should i just fuck you now?" i said no way, if my girlfriend finds out, it's over. but she just smiled wickedly and slid my cock inside her. i got so excited in this thrilling situation that i ended up fucking her hard.