Aliza heard about your Sybian and asked if she could ride it some time. So you get it all ready for her and tell her to get on top. After explaining how to operate the big vibrator, you leave the room and let her have some fun with it. Of course, you did set up some cameras to record the experience. Aliza takes her time and slowly increases the intensity. Ultimately, she's no match for the Sybian though and she cums all over the machine.