naughtyathletics Megan Vaughn: Jack is training Megan Vaughn in preparation for her bicycle ride from San Francisco to Los Angeles. Things are going swimmingly until Megan Vaughn says she needs to get naked in order to be comfortable on the treadmill. Titties a-bouncin', Megan Vaughn's rising heart rate revs her engine enough to where she steps off the treadmill and takes control of the situation and shows her trainer what a real workout is.