What's a big sister for?

Sam was sad this morning when he woke up, and before we knew it we had two extra bodies in our bed.
The whining continued, and Reese took it from there,

"Whassa matter, Sammy?  You saaaad?" she cooed in her best sing-song-y mommy voice.

More whining.

"Did you have a monster in your bed?"

Pause, and blank stare from Sam.

Whispered loudly and urgently, "Say yes!"

blank stare.

"Oh, yep, looks like he had a monster in his bed!"  She shouted joyfully.  She noticed the room was quiet, and maybe she thought Sam looked concerned, because she stroked his hair, and followed up with,

"Maybe it was a pretend monster."