One fantasy I have is having Jack or Lucy in bondage, under their clothes, in public. The idea of knowing Lucy had say a rope harness tight against her skin, maybe even a chastity belt and both holes plugged tightly, shifting when she moves. Or Jack in a cock cage and buttplug.

I think it would be such a thrill, just knowing the secret. However, when I mentioned it one time, it was shot down vehemently by them both in a way that made it clear it was non-negotiable.

So in fantasy it remains... but damn it's a hot one