Thinking that my shy stepsister would never retaliate, I pinched her nipples and she reacted excessively. Riding the wave of success, I relentlessly pinched her nipples as she tried to escape, causing her to drool and orgasm repeatedly due to her extremely sensitive nature! Moreover, with daily nipple development, my stepsister, now addicted to pleasure, actively seeks out penis and nipple stimulation from me! I never expected her to become such a pervert! Although I was prepared for the worst, I went ahead and did it! Now all I can do is pray that our parents don't find out!
