TROY Sometimes I want to punch that smirk off Atlas McCallister's pretty face.He's cocky. A troublemaker. A pain.And, unfortunately, my stepbrother. We've been fire and kerosene since our parents got together, and to keep from exploding into fistfights, we've used challenges, dares, and bets to battle out our differences. Our past bets have been a little inappropriate-scandalous, even-but Atlas's latest bet has...