How do you get a sweet shy 19-year-old girl to open up and come out of her shell?

Sasha is a shy college student with beautiful big brown eyes and a hot little body. She admits to being a bit of a rope and pain slut in her personal life but this is her first time with metal and her first time ever bound on camera. We bind her in a spread-eagle position elevated off of the floor so we can get at all of her lovely bits. She's a little too quiet at first - we think whoever she's been playing with likes it that way. It doesn't take us very long to break through her stoic front to get those lovely reactions. We clamp her pretty nipples and tie them off to the metal so they pull every time she wiggles. We flog her pussy cane her feet and vibrate her sweet little cunt until she can't stop coming.