Or, are you saying that she NEVER showed her desire to you but rather sat back and waited for you to fail to show it to her? If you are wondering how I could 'nail' your situation so accurately with that last sentence well, lemme tell ya, I was your wife at one time and I still am at times. (shame on me, I know)
DING! DING! DING! Yeah, for the most part that's what happened. And I've become a big convert to the whole it takes both people being passionate towards each other for both people to get what they want most.
And I think right now she's trying to learn how to do that, learn how to feel comfortable being sexual around this new guy, and not feel like it'll end. Having almost lost the love of my life you can bet that ain't gonna happen.
"The journey of a thousand miles begins with one step." – Lao Tzu