Do you have any Male friends that ahve really good looking wives that could help you out? If you were in Atlanta, My wife would help out, she is a georgous red head.
But maybe some buddies wife can be your "wing person" tell them your plan to get your wife jealous, that after you flirt with his wife a bit and your wife gets jealous, and you buy them dinner on the side for their help.
Even have a routine, that you hit on your buddies wife and he plays the part of the jealous "guy" but his wife, turns him down...to have a drink with you....that could heat things up a bit.
But Sounds like from reading this one and other posts, you need something more....It sounds like your wife needs something exciting to happen. You need to get to the core of what she really wants and act on it.