Mother in laws Blackmail Tactics

I've been married to my wife for five years, I wouldn't say it's been plain sailing but we get along at times.
We have a very close family which does help to keep us together.
The only person I've had a few run-ins with is the mother-in-law, she can be a very feisty woman to deal with, and we've had some right run-ins over the years.
Don't get me wrong she can be very loving when it comes to her daughter but with me, it's like a red rag to a bull.
She is in her late sixties, I won't say she kept herself in any good shape but for her age she's wearing well as they say.
Things all changed between us one afternoon on a visit to her house.
I had to drop something off for my wife which meant I had to visit her mother's domain.
She met me at the door and after exchanging pleasantries she let me in to carry the boxes I had to deliver.
“ put them in the kitchen”. She said.
Placing the boxes on the table I turned around quickly and for some reason she stood right behind me, how it happened god knows but she fell forward and as I reached out to catch her we both collapsed onto the floor, with her whole body on top of mine.
“ Christ what happened? “ she said.
“ I looked up at her thinking she would kick off at me we both started to laugh, but then as she lifted herself onto her arms both her ample breasts fell out of her flimsy gown.
I couldn't help but notice them, but she looked down and without batting an eyelid she said, “Well at least someone's pleased to see you” she said.
Not a response I expected from her knowing how she is with me normally, but as she was on top of me and I had full view of her breasts I wasn't going to complain.
Fully expecting her to initially scream and curse at me for causing this to happen I was taken aback by her initial reaction.
There didn't seem to be a rush to lift off me as Both her legs had opened and I could feel her warm body on mine, her groin was resting on my knob and due to the fact, she had her tits out my knob just instantly stiffened.
“ looks like someone else is also pleased to see me” she said.
My hard cock now throbbing against her she could feel its stiffness through her thin gown.
“ well with flashing those boobs of yours what do you expect”. I said.
“ my daughter must have some fun with that thing”.
“Sometimes when she's in the mood”. I said.
Then without hesitation, she lowered her breast down onto my face, she then started to move her hips from side to side against my now seriously hard cock.
Again thinking this situation wouldn't last, far from it I just started to suckle in her nipples, reaching up with my hands I cupped each Breast she continued to move her hips against my bulges as both my hands manipulated her soft breasts.
“ god you have warm hands,” she said.
Still with her breasts in my face, I could see the enjoyment she was having as I just went for it on her boobs.
“ I've not had a cock that close to my pussys in years,” she said.
“ well you keep moving like that on it I won't be responsible for my actions” I said.
With that she seemed to move faster, rubbing her crotch on my hard bulge her gyrating hips just made things worse, this woman was horny and to be honest so was I.
I had my mother-in-law's eager body moving seductively on mine and I could tell things were getting very hot between us.
This woman who I had not had any good relationship with over the years was riding my knob and I wasn't about to let her stop.
“ Christ Joan you keep doing that I'm going to cum in my pants” I said.
I still had her soft breasts in my hands when she looked down at me, “Well that would be a waste of cum”. She said.
Rolling off me she pulled me up and taking me by the hand she whispered “Come with me”
Leading me to her bedroom, her gown suddenly fell to the floor, standing in just her panties she turned to me saying” If you're going to cum I want it in me” she begged.
Without thinking the moment just took over us both, I quickly dropped my pants, and as she jumped onto the edge of her bed, lifting her legs I reached under her to slip off her damp red panties.
Again Not thinking about anything else my hard cock stood ready to fuck my mother in laws mature hot pussy.
Looking down I got my first sight of her dark mound with this reddish pink slit opening up before me.
“ right let's see what you've got, get that bloody cock in me and fuck the arse off me” she again begged.
Holding my cock I guided it towards her opening, rubbing her slit up and down with my tip she groaned at me, and then I found her entrance, leaning into her I lowered myself over her body as my cock slid quickly inside her pulsing wet hole.
Reaching up with her hands she could feel my cock sliding deep inside, that hot sensation of her pussy as it was being enveloped by her eager hot mature pussy.
I now had my mother in laws naked body under me, she was begging me to fuck her so I just went for it, our two bodies combined into one fast erotic passion even I didn't expect.
Grunting at me as I pounded the hell out of her body, she cried out for me to go harder, she wanted sex and that's what I wanted to give her.
Both her large breasts bounced in time as my hips just kept thrusting my cock deep inside her. “ Jesus Brian you can bloody fuck” she said.
Grunting at her my hard long shaft just pummeled her tight wet mature pussy.
We both just wanted to cum, to feel that rush of an orgasm, I had to cum inside her, she wanted my cum so I stepped up my incursions and then at that moment of heated passion we both just let out a loud scream, my cock thrust home as deep as I could, my cum shooting up inside her as my cock twitched with each shot of my white creamy liquid.
I could feel her pussy walls pulling me in further to get as much from me as she could.
She let out a loud groan as her orgasm ripped through her body.
Holding myself inside her I lifted and looked at her all I could do was say” What the fuck just happened, why the hell did we fuck” I said.
“ god knows but my god your cocks are amazing, I've not cum like that in years,” she said.
“ what the hell's my wife going to say”. I said.
“ nothing because she won't find out,”.
“ I blame you, those bloody tits of yours,”. I said.
Pushing her boobs together she looked at me,” What these,”.
“ yes if they hadn't dropped out of your gown this wouldn't have happened.
“ you grabbed them first”
“ you rubbed yourself on my knob,” I said.
“ well the look on your face as you fucked me I guess you needed it as much as I did,”. She said.
“ to be honest it's been a few weeks so yep you came in handy for once,”.
“ handy, you cheeky sod, that was more than being bloody handy,” she said.
“Yeah well at least you got my full load”
“ yes I did and the size of that cock of yours was the bonus part,” she said.
“So what happens now? we just forget it happened,”
“ up to you, depends on how think about fucking your mother in laws pussy,
Can I ask you a question, was that you in Oxford the other day, in a cafe‘ in the front window,”.
“I don't think so why,” I asked.
“Well I pulled up at the traffic lights and looked over to see someone who looked like you kissing a woman, they looked very friendly, the best thing was I managed to get a close-up picture of them,” she said.
My face dropped, she knew it was me and had the evidence on her phone.
“ how long have you been cheating on my daughter”.
“ about a month I guess, she's a work colleague,” I said.
“ well I just wanted to see how easy it was for you to cheat and having sex with her mother proves you can't keep it in your pants” she said.
“So if you tell your daughter about me and that other woman I will tell her about what we just did” I said.
“ and who do you think would believe your word or that picture, you choose,”.
“ so this is a shakedown then, so what will it take to delete that picture”
“My daughter had her suspicions you were cheating, she asked me if I could confirm it or not, I too thought you were and what happened? Today proved it, when it offered to you on a plate you men can't help yourselves,”. She said.
“ so why let me fuck you if you already had the evidence,”.
“ I will tell you why, I needed to prove I was right and to be honest it worked, you fucked me and I must admit I loved it even though it was wrong to do so,” she said.
That's when I knew what was coming.
“ so what next, is my marriage over or are you going to drag this out and torment me with it,” I said.
“ to be truthful I should tell my daughter everything, confirm you are a cheater, but I must admit how you fucked me was better than I thought, so I won't say anything to her, for now, if you stop seeing that other woman and once a week until I'm happy enough I want you to fuck me as you've just done,” she said.
“You kidding I'm buying your silence with sex, sex with you her mother” I said.
“That's the deal if I tell her everything, and trust me I can be very persuasive,”.
“ well if that's what I have to do then sex with you it is”.
I was shocked at what she wanted, sex with her to keep quiet I can handle, she is no looker but at least I get sex whether it is with the wife or her mother I'm well sorted.
Over the next few months, I kept to the deal, I fucked the hell out of her she didn't know what hit her, but a fucks a fuck as they say and I got plenty.