Caned while sister watches; standing in corner in family room

Mom caught me masturbating (again) and  took me to the Red Rump Room, and told me to start stripping.
My sister Emily walked in.
Mom said, 

so Emily watched (and giggled) as Mom tied me down on the bench and caned my bottom as I sobbed.

Finished, she untied me and told me to stand, naked with red bottom on display, in a corner in the family room.