Great! (Score 1)

Nice idea, hot sex won't affect it. Oh wait this is /. and geek sex, nm.

So if you have to spice things up maybe have the ring made by Pandora & Pendragon, they started out as kinky jewelers but do all sorts of custom art jewelry work in rare materials now. I'd personally say go for the 14k gold handcuffs too, cause she's gonna own your ass anyway if your choice displeases her, but hey it's your call.

Best of luck.