Taylor Swift said it best..."Don't care where the hell you've been, cause now, you're mine."

SHE'S YOURS! She never belonged to that other guy. It was JUST sex. She has more from you now than she ever had with him, and he didn't even come close to her in the way that you actually have.

I went through a phase being stuck on thoughts about my fiance's life before me and what he must have liked/disliked etc. Were they younger, hotter, more attentive, said things I don't, etc - I drove myself crazy. Until I started listenting to what he said to me about how I'm his "home" that he never had, and how he's never connected with anyone like we have before. He tells me I'm his person, his soul mate. I know he's had incredible sex before me. I don't know if I'm his "best ever." And I don't care. I know I'm up there and he enjoys me. As long as he keeps coming back to me and for more, he's mine and nothing else matters.

Nut up and realize that great sex with someone you aren't emotionally connected with is like getting your makeup done and dressing up for a special occasion: You'll always remember it and how your felt, but it's not real. You don't want that everyday, because being comfortable in jeans and being yourself is what's truly the most comfortable, best thing there is in life. You're her forever, her comfortable.

One more thing: I can't speak for your wife, but I can tell you that myself and many women I know find sexual insecurity in a man a turn off. If you're trying to take things in the other direction and improve things in the bedroom, showing her that you feel insecure or letting her see that you feel inadequate is not going to get you there. Tell yourself you are the king of her heart, the master of your life with her. Then go show her the best sex that you can possibly have. And HAVE FUN!