"Who me?" joke

Sarah and her thirteen-year-old sister had been fighting a
lot this year. (This happens when you combine a headstrong
two-year-old, who is sure she is always right, with a young
adolescent.) Sarah’s parents, trying to take advantage of
her newfound interest in Santa Claus, reminded the
two-year-old that Santa was watching and doesn’t like it
when children fight. This had little impact.
“I’ll just have to tell Santa about your misbehavior, ” the
mother said as she picked up the phone and dialed. Sarah’s
eyes grew big as her mother asked “Mrs. Claus” (really
Sarah’s aunt; Santa’s real line was busy) if she could put
Santa on the line. Sarah’s mouth dropped open as Mom
described to Santa (Sarah’s uncle) how the two-year-old was
acting. But, when Mom said that Santa wanted to talk to her,
she reluctantly took the phone.
Santa, in a deepened voice, explained to her how there would
be no presents Christmas morning to children who fought with
their sisters. He would be watching, and he expected things
to be better from now on.
Sarah, now even more wide eyed, solemnly nodded to each of
Santa’s remarks and silently hung the phone up when he was
done. After a long moment, Mom (holding in her chuckles at
being so clever) asked, “What did Santa say to you, dear? ”
In almost a whisper, Sarah sadly but matter-of-factly
stated, “Santa said he won’t be bringing toys to my sister
this year. ”