Sarah gets off on the feeling being bound very tight, so when she's strapped into the latex straitjacket, she's already wet before all the belts are buckled on.
The rubber compression hood is the icing on the cake for her, allowing her eyes and nose to peek out, but keeping her nice and quiet at the same time - until the electrical stim is inserted into her dripping cunt and turned up on high. Chained and helpless in her rubber outfit, she is left to process the pleasure of the bondage and the pain of her situation as they mix together with a little help from the cane as well.