Copy That (Part 1). Copy That, #1

Cole is a brilliant young inventor. Too brilliant, really, though his best friend, Dominic, has become adept at translating his high-minded concepts into everyday English. Ever since Cole's last invention nearly destroyed the house, Cole's parents forbade him from working on anything else. So they have no idea that he's come up with a brand new invention in the basement that can clone a person's entire mind.
When Cole's sister, Callie, discovers his invention and threatens to tell their parents, Cole makes a split second decision and zaps a copy of Dominic's mind into Callie's body. Now Dominic has gone from stumpy to sexy, a clone of his mind inhabiting Callie's incredible body while his original self looks on longingly. While Cole tries to find a way to restore his sister's mind, the new Callie has to pretend that everything is normal, even though she has none of the original's memories.
But she finds being a woman isn't so bad. Particularly when her new body is smoking hot, and incredibly sensitive. Maybe she shouldn't go back to her dumpy old self just yet. Not when she's enjoying this body so much. And Callie's friends are so hot. And Cole's invention is so easy to use.