It's mine now forever!

Richard had now been stuck in his sister Sarah's body ever since a device their father was working on overloaded & swapped everybody in the house with everybody else.

His sister Sarah was not coping well with being in her brothers body. 

His father Allan was not coping well being in his pregnant wife Emma's body.

But his mother Emma love the freedom being a man gave her just like Richard loved being a cute teenage girl.

So when his mother and father were out of the house and his sister was locked in her room moping he decided to make sure his father would never be able to repair it and put everybody back in there right bodies.

Which did not go down well with his father and sister when they found out what he had done.