Surprises are always fun, at least if you're not on the wrong side of restraints. From Bella's perspective being put into stock and tied to a bench wasn't so bad. It certainly helped that a magic wand was tied between her legs. Good times are ahead from her perspective. All that changed when the TENS unit came out but it's too late to back out now. With the electricity set to shock whenever she makes a sound it doesn't take but an instant for her protests to silence. Making matters worse the vibrator is turned on leaving her struggling to keep quiet. Bella is forced to fight off her inevitable orgasm knowing that if she gives in the pleasure might not be worth the pain.