i blinked in disbelief... my sister, who was supposed to be doing homework, was masturbating while reading an erotic novel... she rubbed her clit with her right hand, pinched her nipples with her left, read aloud the words, imagined them, stimulated her brain, and sent commands from her brain to her pussy to drip with arousal. those commands continued until she reached orgasm... my sister is a fucking pervert...