Aunt Kelly 14 no reason given VIDEO

I was sitting in the living room, reading.
I heard her call out, "Come in here!"
I went to the sun room.
She held her cane and said, "Strip and bend over."
My mouth fell open to protest, "what did I do?"
Then  my mouth closed, and I stripped, and bent over.

I moaned and sobbed as the cane struck my buttocks.

She stopped and said, "Get up, get your house clothes on, and go back to your book." 

I never did find out what it was for.