Silently, I took a final swallow, set my glass down, got up and walked over to her; stood directly behind watching her ass bounce with each step. Her pace was picking up to a good fast pace.

"How long?"

"About Twenty minutes." Her voice already getting winded.

I took a step right to the edge of the treadmill, directly behind her. I watched the muscles of her back move as she ran, listened to her breathing. Felt the pat pat pat of each step, and the bounce of her perfect ass. She could feel my presence, but let me stand as close as I wanted. I don't think she cared...