LaSirena keeps her butt big, juicy, and adorable by giving it regular exercise, and what better way to stay in shape than to change up your routine? Today she was riding her bike, sweating as she pumped her ass to perfection. Gym buddy Ricky Johnson can't resist her delicious booty and interrupts her sweaty solo with some oil and his big, hard cock. Looks like her ass is about to get a real workout.