Tuples and Attributes

I was having a rather freewheeling discussion the other day with someone I had recently met and enjoying the interests and ideas we seemed to have in common. At one point, she casually mentioned her mother, who had just turned 60. And it hit me, I am 10 years older than this woman’s mother! It just didn’t and still doesn’t feel possible. I don’t feel that different than I did at 40; how in the world can I be older her mother?