Need advice re male chastity with traditional sex wife.

Ok, so I was out of town and bored and found a local sex toy store. I thought I'd bring something home, and then saw something I'd never seen/heard of before - a male chastity device. It was pretty expensive, so I passed. But it turned me on immensely. I went to amazon, and bought this: http://www.amazon.com/gp/product/B004GFFAM8/ref=oh_details_o01_s00_i00.

Then, I found this book, read it, and sent it to my wife electronically: http://www.amazon.com/gp/product/B004PLMCCO/ref=docs-os-doi_0

She's out of the house today, and might have a chance to read it while she's gone. I sent it to her after she left, so we haven't talked at all since I sent her the book, so it will be a huge surprise.

I'm not into the whole sissy stuff, but the idea of having my cock in a lock and her controlling my release is a turn on. The only problem is she's pretty traditional, and this will likely freak her out completely. Any thoughts now that the cat's out of the bag?