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