Damn that was a great way to end this story, too bad that Rarity didn't think to make a Hyper Version of the panties that she would be the only pony who would know how to make, that way certain ponies would be able to get them from her so they can try out the Hyper form.

nice work

But what if the Penal Panties has a double penetration mode, or a reversible insertion?

She could be a very successful stripper or porn star instead of a clothing designer