Renate's surfboard-balance training

Renate has her slave on a spring mattress, ready forr to be her surfboard.

She steps on him, finds quickly her balance and begins to dance on him.

His reaction is a rhytmical breathing, while she walks and bounces the the music; may be the noise gets louder, if she moves on his throat and squeezes his windpipe with the rhytm, or does ne noise switch off, if she steps fullweight on the throat... who cares, her slave is only her furniture for balance-training.