How Old Is Grandma?

My husband and i recently moved out of his grandmother's house where we've been for the last two years without her knowledge. A few months ago, she mentioned trying to find some plastic wine glasses with grapes on them that used to be in her basement. The problem is we deftly threw those wine glasses out while we were cleaning. She has since mentioned these glasses at least five times, as i she wants to give em to us for use by our new pool. Brothers. Whatd'll we do? Do we fess up to having tossed the glasses? Every time she asks about them, we say, hum, dont remember seeing them. Maybe they’re in the attic.