Jessica writhed slowly on the bed, her eyes tightly closed.  One hand had sneaked beneath the thin cotton of her white school shirt, and was squeezing and pinching one of her very erect nipples into a state of heightened excitement – the other had drawn the hem of her skirt up to her waist and was now gently rubbing the tip of the buzzing vibrator up and down the length of her panty-covered slit, causing a very obvious wet patch to form on the tightly-stretched cotton.<br/><br/>It was then she heard the door open, and her sisters’ voice.  Jessica shot up, her eyes widened with surprise – her face flushed with embarrassment.  Hurriedly she tried to pull her skirt back down as she sat up, her hand hiding the still buzzing toy behind her.<br/><br/>“A..A..Ashley”, she stuttered, “I thought you were out.  I…umm..just came to borrow something.”<br/>