How to Use A Chastity Cage With Keyholder Pt 3

3.a: The treadmill
Wednesday had come around again. I had gotten a message from Sir to be at his place for one p.m. and I was achingly horny. Besides the fact that I had been locked for a month now, far longer than I ever had been before, I was still feeling the residual excitement from shooting that video in the parking garage on the weekend. So, after doing my blowjob training on my dildo I was ready to go with time to spare.
As usual, I let myself into Sir’s apartment and undressed. Once again, there was a butt plug waiting for me on the stand by the entryway. Just as I was completing inserting it, Sir came into the entryway, and I quickly dropped to my knees from my dildo-stuffing squat. He was dressed in sweatpants instead of his usual jeans, and he had a small gym bag in one hand.
“We’re going on a field trip,” he said, as he stepped past me and opened the apartment’s front door. He stepped out and gestured for me to follow. A little nervously, I shuffled out on my knees. He took out his key and locked the door.
“We’re going down to the fitness room in the basement,” he said. “I’m taking the elevator, but you’ll probably want to take the stairs. I’ll meet you there.” With that he turned and headed toward the elevators.
No time to feel nervous, I thought to myself. I turned in the opposite direction and started shuffling toward the stairwell door at the end of the hallway. I heard the elevator ding behind me, and the doors open and close. I looked behind me — fortunately, no one had gotten off the elevator, and the hallway was empty.
I stood up and hustled to get the stairwell, feeling a bit of...