Right in the butt

It's fortunate that you have already shed your jeans otherwise the rapid expansion of your hips and ass would surely have shredded them. Your skinny boy's butt blows up like a balloon throwing you off balance once again. You stagger back, trip and land on your now well-padded posterior with a thump.

"Ow!" you complain "Come on Zoe be reasonable..."

Your protest falls on **** ears. Zoe has a manic glint in her eye and the bit between her teeth. She raises the plastic gun once more and...