Mark was flying high, within six months of his project taking off he'd been made Vice CEO of the company, admittedly a small one, with two pay rises, but the esteem of his CEO was priceless.
Mark was sat in the most comfortable chair in front of his office desk, provided at great expense by an appreciative CEO. It had everything, adjustable height, sides that fell away an adjustable back and the strength to hold two people.
Mark's mother Janet was at that very moment sitting astride him while he made the necessary adjustments. She'd walked into his office with a coffee for him, it was now sitting on his desk growing cold. She was dressed in stockings, a garter belt and high heels, And nothing else.
'Show me how this "super" chair of your works,' she'd asked, he'd folded the arms down, undid his zip, removed his penis and guided her across his lap. She wanted her feet on the floor to give her control, she'd taken his penis inside her and waited for Mark to set the chair to the correct height.
The only other words she had spoken had been, 'which of my breasts are you going to empty first?'
Mark inspected both, one in each hand, she'd smiled, when she was breast feeding him all those years ago, she always allowed him to choose the breast, she was lost in this reverie when he placed his lips on the aureole of her right breast, pressing behind the nipple and almost immediately her milk gushed into his mouth.
Apart from the suckling he'd hardly moved, it was no surprise when after ten minutes of Janet rubbing against him, she began to orgasm, she was trembling, and he held her tight, all thoughts of his own orgasm gone, as she reached a climax, he gave a thrust, then another, each one giving her another though minor orgasm. So, wave after wave of decreasing intensity seemed to leave her exhausted. She slumped down, no longer able to support herself.
They stayed like this for a few minutes, when finally, she spoke, 'you've not had it yet have you?'
He shook his head, 'I'm quite happy as we are, for a few more minutes anyway.'
They sat in silence.
'I have dinner to prepare so we've got to come up with a plan,' she ground into him, 'would you like me to bend over your desk, I know men like it that way.'
In all the time they had had sex together they had only done it face-to-face, and now he was glad she had suggested this position, he'd fantasised about it enough.
'How do I suckle you when you've got your back to me?'
'Lower your super chair, give me room to manoeuvre.' He did as instructed, 'maybe next time, but you're right, I can't go round with one full and one empty. Once she was satisfied that he'd arranged the chair at the right height, she began to move up and down on his shaft.
He plunged forward, his lips round her left breast, he sucked with difficulty as she moved her body. 'You're like your father, he was above average as well.'
'How do you know what is average,' he'd reluctantly let her breast fall from his lips in order to ask her.
She grabbed her left breast and pushed it back into his mouth, 'that's a story for another day, as for now you've got work to do.'
He felt the smoothness of her vaginal walls, warm and moist, he felt the pressure build up, she sensed he was close to coming and speeded up, careful that she didn't overdo it and have him fall out at the crucial moment. During the last six months she had become an expert in this position and brought him off perfectly.
'Whew, that was terrific, how are you?'
'I wouldn't say no to another orgasm,' she told him, 'you did well to hang on as long as you did.'
She moved up and down on his penis, he glanced down at his shaft, gleaming with her lubricant. I'll tell you what, we can rehearse having sex with me bent across the desk, do you think you can stay hard enough long enough?'
'It's worth a try,' and so saying he lowered the chair, she stood on one leg and his penis appeared still reasonably hard. Unfortunately, this was followed by a huge amount of his cum.
She looked down at all his sperm staining his blue jeans, 'oops, sorry about that.'
'That's not happened before, how come now?'
'It's either the new chair allowing me to be directly above you, and gravity or,' she paused, 'it's from yesterday.'
She said no more and bent over his desk, 'best hurry,' she reminded him, put it in while it's still hard.
He took a look, took position and pushed it in, it was remarkably easy.
'Oh, am I that big, don't tell me I've got a big...,' her voice trailed off.
Mark decided he'd slide it in and out until it became too soft, 'no, I've had a few women in this position, and I've always noticed that it causes the vulva to open. This made her feel better, 'also your skin becomes a bit less elastic as we grow older.'
'I'm only in my forties you know.'
'Yes, but you've also got to realise that you've had a larger that average penis inside you for what, about twenty minutes, your labia are bound to take a bit longer to spring back, that's probably why it was so easy for my old cum to fall out.
She harrumphed but was otherwise placated by this explanation.
Mark felt as though he could keep up this steady rhythm all day long, his mother showed no sign that she'd had enough, but then the computer pinged.
Mark leant forward, pushing Janet further up onto the desk and pressed a button.
'Damn, there's a zoom meeting with our UK office, sorry I have to go in, we're using the conference room.'
He withdrew, she stood up, 'there's a lot of my lubricant on the front of your jeans,' she pointed to the offending mark.