toys

'I'm going to use some toys on you, just to ascertain how much you can take in your ass, see what I'm dealing with.'

He unlocked a drawer in his desk and took out a range of plugs, dildos, and vibrators. 'What would you consider to be the biggest toy you've had up your ass?' he asked. She selected a 6-7 inch pink glass dildo with a ring handle. It was tapered and bobbly in texture. 'Something like that,' she said.

He put some lube on his finger and placed it on her asshole, and even this slight touch seemed to send waves of pleasure through her. She pushed her ass into his finger. 'Steady, steady,' he said. He picked up the dildo. 'Ok, here goes.' He gently eased the first two sections into her ass, and it went in easily. Again she pushed her ass against the dildo, wriggling and giggling at the same time. He gripped the ring handle and pushed the rest in steadily - her sphincter just expanded at every stage and Riley barely made a moan as the final ball eased behind her sphincter and settled in her rectum. 'You took that like a porn star,' said Dr Derriere.

'I really want to be a pornstar,' said the girl.

'Let's find something bigger,' said the doctor. He extracted the pink nobbly plug, whilst Riley frigged her clit furiously. 'Ok, this is the biggest I've got,' he said, picking up a nine inch black dildo. It was just long, and thick, no tapering or spheres, or texturing. 'It is supposed to mimic a large black cock. Have you ever had a bib black cock Riley?' She shook her head.

'Ok - deep breath, let's see if your ass can take this.'

Her sphincter resisted the thick black dildo at first, then once he'd applied a bit more lube and worked her sphincter a little, it accepted the tip, and then he gradually pushed more, and more of it into her ass. 'How's that?' he asked when about 6 inches were inside. she was breathing heavily, 'amazing. Keep going!' She was gripping the sides of the chair tightly. He pushed harder, and slowly, bit by bit, managed to push the whole nine inches inside her ass. He let go, as the final bit was gripped by the sphincter. It wouldn't quite close - he could see the plug inside her rectum as her sphincter spasmed. 'That's impressive,' he said.

'Is the whole thing inside?' she asked.

'It is,' said the doctor. 'The only way to get it out is to push it out. I think you have a one in a billion ass - I suspect that you may have multiple G-spots in your rectum, meaning that you are one of those rare people that prefer anal sex. Would you mind if my colleague Dr. Staff, came and had a look at you? Or can't you wait to push out the dildo?'