The one where I embarrass myself

I can't tell women's ages.  No idea whatsoever and when I guess, I'm always wrong.

So today a woman stops by to buy a raffle ticket.   We were set up at the Haggen (grocery store chain in the Pacific NW) in Burlington.  She has a young lady in tow.  As she fills out a ticket I point out to the young lady that she stands to inherit the bike.  She starts laughing hysterically and tells me that she is the younger sister, and only by three years.

Boy did I feel like a jackass.   So that's what I said.  Where else do you go with that one?