We causally chat while waiting for my brother. My sister-in-law is such a know-it-all and claims she can make any man cum fast. To my surprise, she bets she can make me cum in five minutes or less while her husband is at the store picking up the beer. Do you think you could last longer? She aggressively deep throats and hungry slurps on my full big balls, making lots of noises and she sucks. What do you think happens next? lol