Duncan and Ali Frazer had been married for six years but were going through a sticky patch at the moment. They were both in their mid-thirties and they had no children. After the early years of being together, things had started to stagnate and sex between them was becoming less and less frequent.

When they did have sex it was usually in the missionary position and any attempts by Duncan to reignite their sex life were usually rebuffed by Ali.

A couple of years earlier, Duncan had put Ali over his knee and started to spank her bare bottom but rather than get any pleasure from it, Ali went ballistic and threatened him with divorce or involving the police if he ever did such a thing again.

Before he met Ali, Duncan had another steady girlfriend and they both got immense pleasure from him spanking her arse and the sex that followed. Duncan and that girlfriend eventually drifted apart but he had started to regret not fighting harder to keep her because his sex life was certainly far better with her than it was with Ali.

Ali's divorced mother, fifty-eight-year-old Heather Preston, was currently staying with Ali and Duncan for a few days and she could tell that all was not well between her daughter and her daughter's husband. Heather was reluctant to quiz Ali about it but was concerned that the marriage might be crumbling.

Heather had divorced Ali's father before Ali and Duncan got married and she had no regular men in her life although she did sometimes have sex, occasionally with a friend's husband, without the knowledge of her friend, and sometimes she had one night stands.

Heather was due to go home in two days' time and she was in bed at night when things erupted in her daughter's bedroom at the other end of the landing.

"You fucking pervert! I told you before not to do that," shouted Ali.

"Not so loud, your mother will hear," protested Duncan.

"I don't care if she can hear; Get out of this room," continued Ali.

"Sorry, let's talk about this," said Duncan, trying to calm his wife.

"Fucking get out!" shouted Ali, even louder.

What Duncan had done to cause this outburst was to caress Ali's bent over arse but it was not that so much as the words that he had used.

"You have a lovely arse, I wish that you would let me spank it," Duncan had suggested, despite the warnings from two years before.

"Get the fuck out of here," screamed Ali, literally pushing Duncan out of the bedroom door.

Down the corridor, Heather was wondering if she should go and see what was going on, she was also wondering what Duncan had done to provoke Ali's outburst.

Two bedroom doors closed, Ali's and the spare bedroom, and then there was silence.

Heather thought of going to her daughter but decided to leave it for now. She could not stop thinking of what Duncan might have done to upset Ali so, maybe he tried to fuck her in the arse?

Heather had not had a cock in her arse for ten years or more but she did not think that she would object if a man tried to give her anal.

The night went by peacefully but there was certainly an atmosphere at breakfast with Ali and Duncan not talking to each other and both only acknowledging Heather's 'Good Morning' with a grunt.

Ali did think of apologising to her mother for the commotion the night before but, for now, she said nothing.

Both Ali and Duncan worked, although Duncan sometimes worked from home.

Duncan left for work and Heather decided that she had to say something to Ali. "What was that all about last night?" Heather asked her daughter.

"It was nothing but sorry we disturbed you," replied Ali.

"It did not sound like nothing; You called him a fucking pervert," continued Heather.

"I don't want to talk about it," responded Ali.

"You do need to talk about it; If not to me then to Duncan," said Heather.

"I am not going to talk to him about it; Anyway, I have to go to work," said Ali, apparently ending the conversation.

Ali went to work leaving Heather wondering about the state of her daughter's marriage.

Later that morning, Ali sent Heather a text. 'Mum, I am coming home at lunchtime, you deserve an explanation,' read the text.

"Only if you are sure, don't tell me anything that you do not want to," Heather replied.

As it got close to lunchtime, Heather had convinced herself that it was most likely that Duncan wanted to give Ali an arse fucking and as she had decided that that was the case she had started to think what she would say when Ali made the announcement.

Heather decided that she would not tell her daughter that her ex-husband sometimes fucked her in the arse but she would say that some women liked it whilst others found the thought disgusting.

Ali arrived home and mother and daughter sat down for a coffee.

"You do not have to tell me anything that you do not want to but obviously there is some problem between you and Duncan," said Heather.

"We have been fighting for a while but I had told him before that I did not want it," said Ali, still not saying what 'it' was.

"Yeah, well some women like it and some don't," said Heater, convinced that they were talking about arse fucking.

"But he spanked me once before and I told him then not to dare do it again," said Ali.

"Spanked you? Are you saying that he wants to spank you?" said Heather, almost incredulous that this was what the flare-up was about.

"Yes, the pervert; I even found some books he had got stashed away with pictures of men spanking women in them," said an aggrieved Ali.

"Let me get this straight; Are you saying this fuss was because he wanted to spank you?" asked Heather.

"Yes, it is fucking perverted," replied an indignant Ali.

"I thought we were talking about something way more disgusting or perverted than that," said Heather.

"Are you taking his side?" demanded Ali.

"I am not taking sides but I do not think that spanking comes under a major perversion; True some women like it and some don't but I do not think that it is worth falling out over," said Heather.

"Mother! You are as bad as he is," said a shocked Ali.

"I am just saying that, in my opinion, there are far worse things than getting your bottom smacked," said Heather, who missed the spankings that her ex-husband used to give her and the sex that usually followed.

"But I don't want my bottom smacked," said Ali.

"That is obvious and I am sure that Duncan will not try it again but you should be able to smooth this over," said Heather, who was fighting mentally with the idea of herself going over her son-in-law's knee.

"I will talk to him tonight but I still don't see why you are taking his side," responded Ali.

"Darling, I am not taking his side; Spanking is just something that you are either into or you are not, no big deal," said Heather, who was longing to get her big arse spanked again after several years.

Ali eventually went back to work leaving her mother pondering whether she was seriously thinking of offering her arse for her son-in-law to spank. She did not know if he would accept the invitation if made, and she doubted the wisdom of making the offer but fuck, she could do with having her backside tanned and just possibly having a good fucking to follow.

It could only possibly happen if Duncan was working from home the next day, Heather's last day with her daughter and husband.

The arse spanking and follow-up fuck was just about all that she missed from her former marriage.

Heather spent most of that afternoon thinking about asking Duncan to give her a good spanking and had just about decided to do so when it was getting close to Duncan and Ali getting home from work. If it happened it had to be without Ali's knowledge because if her daughter knew she would probably disown her mother.

Heather also rather liked the idea of Duncan fucking her after he had made her buttocks glow but it had to be taken a step at a time.

Heather and Duncan got on reasonably well together although neither had really had sexual thoughts about the other, until now. Duncan had glanced at Heather's very full buttocks in clothing a few times over the years but that was as far as it had gone.

Duncan actually got home from work before Ali did but he and Heather just exchanged pleasantries and Heather had no intention of telling him that her daughter had told her what the previous night's argument had been about.

Ali came home from work soon after and Heather got out the way to give them some space to talk if they wanted to. The atmosphere at dinner was a bit strained but at least Duncan and Ali appeared to be speaking to each other so that was an improvement on the morning.

That evening Duncan said that he would be working from home the next day and Heather felt her buttocks give a sort of involuntary twitch. The spanking and maybe fucking was a possibility for the next day it was just that Duncan knew nothing about it yet.

That night Ali and Duncan were back in the same room but Heather had no idea if they made love or not, as it happens, they did not. Heather had made up her mind to approach Duncan about giving her a spanking and she was very hopeful that he would. She could not resist masturbating at the prospect and she came imagining herself getting her bare arse tanned over her son-in-law's knee.

All three of them were happy at breakfast with Heather feeling both nervous and aroused.

Ali went to work and Duncan went to the room that he used as an office when working from home.

Heather could not wait too long before making her move so decided that she had to do it when she took Duncan his mid-morning coffee. It might all go horribly wrong but she had to try.

She had put on her tightest pair of trousers and some bikini type knickers underneath but if all went as planned, they would both be off before the spanking finished.

Heather tapped on the door to the room where Duncan was working when she brought him his coffee. "Hi, just brought you this," said Heather, trying to give her sexiest smile.

"Oh thanks, Heather, I will miss this when you go home," replied Duncan, not that there had been many days during Heather's stay that Duncan had worked from home.

"Yeah; Do you have a couple of minutes to talk?" asked Heather.

"Sounds serious; Yes, I can take a break," replied Duncan, swivelling his chair a bit and, probably subconsciously, opening his legs.

Heater felt her eyes go to his crotch and it looked quite impressive. "Um, not really but Ali told me what you two argued about two nights ago," said Heather, forcing her eyes away from Duncan's crotch.

"Oh did she?" said Duncan, a bit self-consciously.

"Yes, I told her that spanking is no big deal, a lot of women don't like it," said Helen, wanting to continue the sentence but deciding to try to take things slowly.

"Well she certainly doesn't but it was my fault because she made it clear once before that she wasn't interested," said Duncan, ruefully.

"Yes, as I said, a lot of women don't like it....but then again, a lot of women do," said Heather, her eyes fixed on Duncan's.

"The girlfriend that I had before I met Ali was really into it," confided Duncan.

"My ex-husband used to spank me," Heather almost blurted.

"Oh, did he?" said a genuinely shocked Duncan.

"Yes, and I loved it; I miss it," revealed Heather.

"Oh," was all that Duncan could say.

"Duncan, I know that you are into spanking, will you spank me?.... Please," said Heather.

"Oh, Ali has put you up to this to test me," said Duncan.

"No, honestly, Ali knows nothing about this; I want a spanking, I need a spanking," Heather almost pleaded.

"Heather, I can't believe this; It is some sort of trap," said a still disbelieving Duncan.

"I promise you that it isn't; I want to go over your knee for a good hiding but if you do not want to do it then fine, let's forget it," said a disappointed sounding Heather.

"It is my dream to give a woman a spanking like I used to give my ex-girlfriend but I can't help thinking that Ali has put you up to this," said a confused Duncan.

"I first started thinking about it when Ali told me yesterday that you were into spanking and I have thought of little else since; I even masturbated in bed last night imagining you spanking my arse," said Heather, before adding, "Please Duncan, please give me a good hard spanking."

That seemed to convince Duncan and his penis stiffened in his jeans. "You really are serious, aren't you?" said Duncan, his voice cracking a bit.

"Yes, I am serious; I want you to start over these trousers then they come off and then after a lot more over my knickers I want a long and hard bare arsed spanking," stated Heather.

"Fuck!" was all that Duncan could respond.

"Maybe after," giggled Heather, now convinced that she was going to get the spanking that she desired.

It had now dawned on Duncan that it was for real. "When? Where?" asked Duncan.

"Well, now I hope; Maybe take a kitchen chair into the lounge for you to sit on," replied Heather.

"Yeah, right, now," said Duncan, standing up and realising that he was fully erect in his jeans.

Heather had now turned and Duncan studied her backside as he never had before in the realisation that he was about to spank it.

Heather and Duncan were both nervous and both were highly aroused. Duncan collected a chair from the kitchen and took it into the lounge where Heather was waiting. Duncan put the chair down in the middle of the room and sat on it, Heather moved so that she stood to his right.

"I want you to spank me as hard as you can over my trousers and then, when you decide, tell me to take them off," started Heather.

"Right," said a still slightly incredulous Duncan.

"Then spank me hard over my knickers and when you are ready tell me to take them off," continued Heather.

Duncan did not speak.

"Then spank me as hard and as long as you want on my bare arse; I will probably orgasm more than once during the spanking but do not stop; You spank until you decide that I have been spanked enough, okay?" said Heather, whose knickers were already very damp in anticipation.

"Okay," Duncan managed to reply and Heather put herself over his lap.

Duncan looked at the mature buttocks in the tight trousers for a moment and then got on with the job SLAP SLAP SLAP SLAP SLAP SLAP he started spanking Heather's buttocks.

"Harder!" Heather exclaimed from time to time as Duncan continued spanking her, almost in a daze.

Heather writhed and squirmed and was close to cumming as her son-in-law spanked her big arse.

Duncan suddenly seemed to remember his instructions. He momentarily stopped the spanking, "Trousers off," ordered Duncan.

Heather, on the point of orgasm, struggled up. Her face was red and her eyes sparkling, partly with tears and partly with excitement. This spanking was going even better than she had hoped.

Heather removed her trousers and got back over Duncan's lap but not before he noticed the very wet patch in her yellow knickers.

Duncan spanked her hard and fast over her knickers and Heather bucked and writhed and then orgasmed. "Shit! Fuck!" exclaimed Heather as she came but, as instructed, Duncan continued with the spanking.

After spanking her over her knickers for a few minutes, Duncan gave the next instruction. "Knickers off," said Duncan, who was concerned about ejaculating in his own underwear.

Heather again struggled up and removed her cum soaked knickers, her hairy cunt was on display before she lay back over, presenting her large bare arse.

Duncan let out a little gasp as he saw the naked crimson mounds and he wondered if the woman had had enough but as if reading his mind, Heather clarified the situation. "Spank my bare arse as hard as you can; Keep spanking until you decide to stop," said Heather, her voice punctuated by sobs.

Duncan spanked her bare cheeks as hard as he could, his hand was stinging so he knew how her buttocks must feel.

Heather was squirming and writhing and she came again, hard. Duncan kept spanking.

At last, with both Duncan and Heather panting for breath, Duncan stopped the spanking although Heather would not have objected if he had continued.

He had spanked his mother-in-law harder and longer than he had ever spanked his former girlfriend but Heather had obviously enjoyed it. Duncan gently stroked Heather's buttocks before softly suggesting that she stand. "Do you want to get up? It is done," said Duncan, kindly.

After a slight delay, Heather got up and cupped her arse cheeks. "Thank you, I needed that," she sobbed.

They both then noticed that Duncan's jeans had been soaked by Heather's second orgasm. "Think they had better come off and go in the wash," laughed Heather, weakly.

As Heather continued to rub her very well-spanked arse, Duncan stood and removed his jeans, his erection stretched his boxers.

"I can wank you, suck you or we can fuck, the choice is yours," offered Heather.

Duncan had never been unfaithful to his wife but now his mother-in-law was offering him the chance. "Um, what about Ali?" asked Duncan, or at least his conscience did.

"I will not be telling her and I don't suppose you will be," said Heather, still with her hands on her buttocks.

Duncan was still unsure. "Put those jeans in the wash and let me know what you want when you come back but I could do with a good fucking," said Heather.

Duncan went and put his jeans in the washing machine and switched it on. When he returned, he had also removed his boxers and his erection was standing impressively proud. "Let's fuck," said Duncan.

"Down here or upstairs?" asked Heather, gently stroking Duncan's cock.

"Your bed," said Duncan.

"Okay," said Heather, turning and leading the way up the stairs, her large bright red arse swaying as she painfully walked.

They reached Heather's bedroom and they kissed. They then removed their upper clothing. "John usually fucked me from behind after a spanking," said Heather, of her ex-husband.

"Fine with me," replied Duncan, who very rarely took his wife from behind, because she did not really like it.

Heather got on her hands and knees near the foot of the bed and thrust her arse backwards invitingly. She was at the perfect height for Duncan to stand behind her and he dragged his erection across her buttocks leaving a trail of precum.

Duncan positioned his cock against Heather's cunt and eased in as she pushed back. "Shit, oh yes," purred Heather as Duncan slid almost effortlessly into her already soaking cunt.

Duncan varied the speed of his fucking, sometimes very slow, then a few quick thrusts, then slow again.

"Fuck! Shit! Bastard!" wailed Heather as Duncan took her close to orgasm then slowed.

A series of quick thrusts had her cumming. "Oh fuck, oh, oh, oh, oh fuck," shouted Heather as she came.

Duncan had her cumming twice more from behind before turning her around and, with her legs on his shoulders, fucked her from the front, still with him standing but now needing to bend his knees slightly.

Duncan was fast approaching ejaculation, fucking Ali was never this good, but he took Heather to another shuddering orgasm before Duncan made an announcement. "Shit! I am going to cum," panted Duncan.

"Yes baby, cum in your mother-in-law's hot cunt," breathed Heather and, with a long groan, Duncan spurted jet after jet of spunk into her.

They would both have liked to spend the rest of the day fucking but Duncan had supposed to be working so they both showered and got dressed. Duncan complained that his coffee was cold when he got back to the room that he used as an office.

His jeans had finished the wash and Heather tumble dried them and he put them back on, all evidence of one of Heather's orgasms having been removed.

Ali came home, unannounced, at lunchtime but Duncan was working and no indications of what had gone on were evident although, if she had thought about it, Ali might have wondered why her mother spent the time standing.

After Ali had gone back to work, Duncan and Heather agreed that there would have to be more spanking and fucking in the future but where and when was fluid.

Heather drove home the next day, content that she had had an exceptionally good spanking and an exceptionally good fucking.

Duncan knew that he had a mature arse to spank should an opportunity arise and Ali knew that there would be no more suggestion of her husband spanking her, although she did not know that her mother had helped out there and that her mother had received the one thing that she missed from her former marriage.