Okay. Short 'n' sweet, heh...
First of all, I hope that the "she's not interested" part is a certainty (like, you talked about it) and not a figment of a reluctant imagination?
Secondly, if and when you talked about it with your other half, how did you tackle the subject? Did you come in like a bulldozer, or did you give subtle hints?
And is there a chance, regardless of the reluctance of your wife, that you could introduce some mild BDSM, like spanking, or tying-up?
And what do you mean with "I'm into BDSM"...? Are you a full-blown sadist who dreams of a vast dungeon with droves of slaves, or are you the concervative schoolmaster type that likes the odd spanking?
JJ