The Sleep-over

On Mom & Dad's movie night, Nick & Corinne get to do a sleep-over (they both sleep in the same room). After, Dad walked up an hour after lights-out after a suspicious crash. The darlings were fast asleep. Then, Mom went up:
Wide-eyed Corinne: "Hi Mom"
Nick: "She (Corinne) keeps talking about things that aren't important."

I never had a sister. These lessons came much, much later.