ooooh fuuuuckkkk
Reinhardt heaving and putting his whole weight against whatever he’s tethered to… maybe he’s wearing a nice harness so he doesn’t hurt himself… just all that muscle and strength straining towards his Mistress.
I bet he would be the best pup ever. Once he embraced the lifestyle there are no regrets. No inhibitions.
Just him being a good pupper and wanting to do everything his little lady asks of him.