Sneak over to Amanda's house
From Create Your Own Story
Looking through Amanda's window, you see her playing spin the bottle with Sally Alderson. Both girls are naked. The first spin lands Sally. Amanda spanks Sally with a paddle once. The second, third and fourth spins land on Sally. For each spin, the number of whacks Sally gets increases of one. The fifth spin lands on Amanda. Sally gets to paddle her five times. The sixth spin lands back on Sally and Amanda paddles her six times.
"Hey, Sal, why don't we triple the spins" asks Amanda.
"So the next person gets twenty one?"
Sally agrees but regrets it when the bottle lands on her again. Amanda gets to paddle her twenty one times.