OMG, you found a real Mona Lisa at a yard sale! I just know it's a genuine Mona Lisa by the way you referred to "the woman" in the painting.
It's a little known fact that Da Vinci painted many
Mona Lisas beside the one in the Louvre. He kept painting them and painting them until he got it right. Here's a small sample of some of them that have turned up so far.
He refused to allow these other originals to be displayed, or even known about, but more and more have surfaced at yard sales these days. You seem to have been one of the lucky buyers who spotted one. Congrats! You own a genuine original Mona Lisa! I don't have to see it. I am never wrong about these things.