She tightened the straps around his wrists and ankles, ignoring his protests as his arms were stretched up towards the top corners of the bed and his legs were forced uncomfortably far apart.
"You wanted it," she told him sharply, "Now shut up and enjoy it."
She consulted the notes she had taken during their preliminary meeting: tied securely to the bed naked. Well, that part was done. He was completely naked and spread-eagled on the bed, and certainly secure. There was absolutely no way he would get out of those wrist and ankle straps until she unbuckled them.
Next? She consulted the notes again: sit on me for a minimum of thirty minutes, and stop me talking to you at all. She considered this instruction carefully. 'Sit on me' was rather vague, with a number of possibilities. As he had not specified, she clearly had a choice.
She chose to sit on his face. Not that it would be particularly comfortable for her but it was, she decided, the best place to be sitting if and when she had to carry out his second instruction of stopping him talking.
He had not specified what she was to wear or anything else she should do or not do, so she decided that it was completely up to her. He knew her particular likes and specialities, and therefore he knew what to expect. He could hardly claim to be unaware of her love of causing pain and discomfort, so undoubtedly he had assumed this would be part of it.
She climbed onto the bed and sat, for the moment, astride his chest. She had not bothered to take off or to change her leather trousers, and in fact they seemed ideal. She tweaked his nipples playfully then turned round to face his feet, and moved slowly backwards until she was sitting right on his face. Her legs were apart and she could just see his mouth and chin between them. She settled her weight down onto him, wriggling to get comfortable.
"You're hurting my nose," came his voice.
Immediately she brought her leather-clad thighs together, covering his mouth. Stop me talking to you. That had been his instruction, and that was exactly what he was going to get.
She had, she realised, also cut off his air supply when she stopped him talking by covering his mouth. That should make him think twice about trying to talk again! She held her thighs together for just ten seconds.
As she uncovered his mouth again, he spoke at once. "Look, this really wasn't what I meant..."
She clamped her legs together again, holding that position for twenty seconds this time. Slowly she moved them apart.
"Stop this!" He sounded angry, and she felt him try and squirm away from her as she covered him again, locking him under her into that airless leathery world. She counted slowly to thirty.
He still had not got the message. "Get off me. Let me go..."
Forty seconds. Really, he should have waited before trying to speak again and given himself time to recover his breath properly.
Now he realised what was going on and had the sense to keep quiet. He would just have to wait, silent, under her for thirty minutes whether he was uncomfortable or not. That was what he asked for, and that was just what he was going to get.