Suddenly, I got a stepsister who indiscriminately sleeps with men! She's said to be on a rampage of sex until she finds the perfect match. But she keeps drawing the short straw and is always in a bad mood. One day, my virgin penis was seen by my stepsister...and suddenly she started evaluating it! Then, unable to hold back her desire to fuck, she forcibly inserted it! The result? My 'length,' 'thickness,' and 'stamina' all matched her ideal as a sex maniac stepsister—what a surprising match!? I also, overwhelmed by the pleasure, started vigorous thrusting & continuous internal ejaculation!
