This is a nice predicament bondage set-up. The straps on the table stretch him out and then the cords keep everything nice and taut. She looks like someone plucking at a musical instrument, so I’d guess that one of the cords just got twanged. I do know that if I was in this position Lydia would be unable to resist tickling the soles of my feet, leading to much jerking and tugging of delicate parts.
This is of course from Divine Bitches.