Yes

You managed to finish up the rest of your work for the evening during the 40 minutes that you had assigned Tracy to go for her run. Noticing that you were already 5 minutes late to go relieve her from her exercise, you quickly head down to the gym. Once there you find Tracy, still on the treadmill with the clamps attached to her nipples, preventing her from falling too far back. However, she's now noticeably getting exhausted. Her stride looks more sloppy than usual and whilst you take a moment to watch on you notice that she's occasionally falling back, just for the clamps to tug at her nipples, forcing her to pick up the pace.

You decide to put her out of her misery and go put an end to her run. Moving in closer, you notice that she's now covered in sweat from the physical exertion and her breathing has grown heavy.

"Looks like you're doing well slut, maybe we should keep you going for another 10 minutes or so."

"Please sir, I'm so tired and these clamps have been pulling at my tits non-stop." She struggles to get the words out between breaths.

You laugh and say "don't worry, I was just joking. That's enough for today."

You move over to the console and press the stop button, causing the treadmill to slowly come to a halt. Tracy bends over with her hands on her knees, huffing and puffing as she catches her breath after the intense workout. You give her a moment to recover before saying anything.

"Well done slut, I'm proud of you." You give her a playful slap on the ass as encouragement. "As a reward for your hard work, you can finally have that tasty treat you've been saving on your chest."

Tracy still hasn't quite got hold of her breathing enough to respond verbally, but instead looks at you and smiles before she grabs her tits and pulls them up to her mouth, licking up the load that's been coating her chest for the past couple hours. Any cum she can't quite get with her tongue, she scoops up to her mouth with her finger.

"Mmmmm, thank you sir. It was extra salty thanks to all the sweat." She giggles playfully as she says this.

"Speaking of, you better get washed up, you definitely have worked up quite the sweat there. This is why your training is so important, why would a man want to use the holes of a sweaty pig like yourself after you've been fucking for hours."

Tracy looks down at the ground in shame at your demeaning comments but does as she's told and heads off to the shower.

Before she leaves the gym she turns back around and asks "can I use my toy in the shower sir?" She is of course referring to one of the many suction cup dildoes that she now owned.

"Go ahead, but remember, no climaxing without permission."

"Yes sir. Thank you sir."