the worn-out years

Our nephew Leighton (age 10) announced to us that his mom was done having kids.
"Me, too." I told him.
Danny asked, "How does your Dad feel about that?  Does he want more kids?"
"Oh, no." Leighton assured us.  "He's done, too.  They're in their worn-out years."

Now here's a kid who clearly has a handle on reality!