In a game of sexual one-upmanship, I challenge my buddy to a high-stakes bet: fuck his girlfriend's tight little asshole and make her cum. As she spreads her legs for me, her innocent face flushes with lust and embarrassment. I tease her tight asshole with my thick cock, making her beg for more. She cums hard as I stretch her asshole wider, her tight little body convulsing as I claim her ass as my prize.