When Siara was Sweet Fifteen and a Half, I took her to the DMV to get her permit. I had to sign a paper that listed me as her "Parent/Custodian".
Siara: "So, you're my custodian?"
Me: "Yes, it would appear so."
Siara: "Then I guess you should be cleaning my room instead of making me do it."
(It made the very STERN and SERIOUS DMV employee laugh out loud.)