A love note

Mark picked up the paper with a sniff of superiority.  Someone had sullied his desk, and we all know the boy likes his desk pristine (his room is quite a different matter, unfortunately).

"That's yours," I told Mark before he slid it into the recycling.

"It is?" he said wonderingly.

He read it and a slow smile spread over his face. "Why did she write this for me?" he said.

I shrugged.  "Because she loves you."

Then Mark's smile almost cracked his face in two.  Sisters can be pretty great.