"I wish that Jon was warm bathwater in my bathtub and I wish that he would still be able to see, hear, feel, smell, and taste in that form."
As Jon heard the last syllable of Becky's wish he froze in place and closed his eyes as a strange sensation flowed through his body like a ripple through a pond. His body felt very warm and calm as he suddenly burst open and spread out all over the confines of a container. Jon opened his "eyes" to see the ceiling of his sisters small bathroom. Jon shifted his eyes (he found that he could move his eyes around to any part of his watery body) around to see that he was indeed inside a bathtub and that he was the water currently occupying it.
"God, this is too much, this can't be real," thought Jon. He tried to move his fluid body around to see if he had any control over it with no success. "My fucking future involves me going down the drain because my sister had to dick around with the rock."
Jon heard the door to the bathroom open and his sister stepped into his field of vision. Becky was naked with the exception of her bra and panties. In her left hand she carried a towel which told Jon what Becky's immediate plans for him were.
"I guess that's you, Jon. Don't worry, I'll change you back but.." Becky undid her bra and shimmied her panties down on to the floor. "You look a little too inviting in your current form so why should I let you go to waste."
Becky submerged her right foot into her brothers watery body as she threw off her bra in preparation for her soothing bath.