"You have to make sure that your boyfriend is suitable for your sister!" One day, my sister brought her boyfriend home, but she didn't look good! "What does this guy have?" I thought to myself, and decided to try different things to see if he was a suitable boyfriend! First of all, let's twist the nipple 360° from behind for focused stimulation! And then whisper a dirty word that seems to melt in your ear! After that... I fainted from the pain and came immediately! "It's terrible to feel that your sister is right next to you!"