Replying the question, "Is she lying?", I'd say - No, she isn't.
I agree with Moni, and Reeka, and Yorick in everything they said here...
When I was so much in love with my ex, I honestly did not find any male being on the planet (except him, of course

) attractive, though I never told my ex that he was "the only one".
It was like I did not aware that there were
other men around, I had that one I needed and it was enough. I found many men to be wonderful friends and nice persons, but never saw them as males.
Then, I suddenly found out that there were others and some of them were really attractive - but I was able to realize it only because I stopped to love that "only one"...
So, Larry, I believe your wife is speaking about things she feels and you're very lucky she feels it exactly this way

.
Tanda.