Another hour later and my session was finished, and I was seated on one of the padded benches near the shelves of bags. I sipped from my bottle of water as I let my body relax. I was covered in sweat and my muscles felt numb, I would feel this tomorrow.

My eyes drifted over to the treadmills where Liz was running again—though at a much slower pace—to cool down. I never did get my mind off her while working out, more than once I got a great view of her legs and or ass as she stretched, lifted or squatted, she really was in great physical shape.

She had...