Sometimes You Just Can't Win

conversation from this morning:

Mom: I can't believe my baby's starting Kindergarten next week.
Arnold: I'm not a baby. I'm a kid.
Mom: Sorry. I can't believe my littlest kid is starting Kindergarten next week.
Arnold: I'm not a little kid. I'm a big boy.
Mom: oookay. I can't believe my youngest big boy is starting Kindergarten next week. [Pause for comment, which doesn't come] Am I getting old, or what?
Arnold: You're getting old.