I too can see you setting yourself up for a fall. What a fantastic effort you have made and I'm sure any woman would feel flattered and loved by your actions. But your wife may see it as an elaborate attempt at getting in her pants (Desperate times call for desperate measures I know). Maybe you could be more 'casual' about it. See if she initiates anything, if she doesn't maybe try in a couple of days. She might intitate even! Your wife will be feeling pressure to have sex on Valentine's Day because it is the nature of the day. That in itself is a turnoff. Focus more on the love side of things and take the pressure off. Hopefully your wife will see how lucky she is and want to ML to you soon.
Good luck!
It can't come quickly enough
And now you've spent your life
Waiting for this moment
And when you finally saw it come
It passed you by and left you so defeated.
Scissor Sisters - 'It Can't Come Quickly Enough'