My suddenly-formed stepsister is a graduate of a famous slutty girls' school in the local area, and is usually defenseless and unguarded, so it's only natural that her panties and breasts flash! Knowing that my stepbrother is a virgin, I purposely get close to him and seduce him, making it seem like he'll let me do it! In fact, my stepsister, who wanted to do it with a virgin, immediately agreed to my stepbrother's plea to let me do it! My stepbrother was so happy with his first sex that he shook his hips vigorously, making my stepsister cum so many times that she arched her back in a continuous orgasm! My slutty stepsister moans as he cums inside her over and over again!