Lisle tottered through the first part of her lesson, swayed through the middle, and by the end her flanks had felt equal shares of swats and soothing.  Some of her successes were accidental - a misstep that led to recovery in serendipitous elegance, a sway that got properly redirected by the sheath's tingling pressure.  Now she was instructed to rub against a piece of furniture - and purr.<br/><br/>Desperate to avoid further whipping, she made an attempt at it.  It took her a bit of thought to figure out how to get her sex against the couch, then a little more adjustment to keep the pressure of the sheath on her clitoris from being compounded by the rubbing.  Purring was actually the easy part of it.  While she didn't have the unique vocal cords of a cat, she was able to position her tongue behind her teeth and trill it in a fair imitation.<br/><br/>"R-r-r-r-r-r... r-r-r-r-r-r... r-r-r-r-r-r"