wrist knot stuck

A minute passes. Two.

"Ahh.. Amy, what are you doing? Just get my hands loose."

"I can't. The stupid knots stuck. It's your fault. It was OK before. You've made it tighter with all that wriggling around."

In frustration she pulls hard at the knot. Your hands are pulled away from your back and the crotchrope tightens, crushing your clitoris against you pubis.

"OHHHH.... God... God...". Kneeling on the carpet, you fight the tide which threatens to engulf you. After a minute you have control again, and can smile at Amy, who's been watching wide eyed at the effect of her pull on the rope.

"It's OK. It's OK. It wasn't your fault. But we have to get my hands loose before I cu - I mean, never mind, just untie me. Quick"