Biting & Slurping Ginary's Toes (QT 720x486)

My step-sis is always reminding me how much of a submissive slut i am.  i have a weakness for pretty feet and after she gets a pedicure she basically has me wrapped under her spell  she commands me to finish a job i started earlier and it includes biting and sucking her perfect feet.  i start by removing her sexy leather boots.  i rub her legs and calves before starting to devour her little piggies.  i bite her arches first and then each toe one by one. ginary winces in pain as i start to hit sensitive points with my pearly white teeth. it hurts and feels good all at once she tells me. my step-sister's pussy starts to lubricate with every bite. i can clearly see her getting wet.  how is this possible she asks?  how can pain bring so much pleasure?