Stepsister Wants Sex Lessons

Your stepsister is dating a guy in college but she feels like she can't satisfy him sexually so she asks your help. She wants you to teach her how to fuck better! You are not sure if this is right but she begs you to show her at least some sex moves that would turn him on. Then few days later she comes with another request, she wants to learn how to give the best blowjob so she can give one and then dump her loser boyfriend. All this just keep escalating until she wants to...well take a look what happens.