The Mother In-law From Hell
by Jim Priest
Copyright© 2025 by Jim Priest
Fantasy Story: Jim discovers that his grossly overweight mother in-law, Paula, has taken up bodybuilding and turned all that fat into huge intimidating muscle. She also dominates him with Ju-Jitsu skills he never knew about and mind-blowing sexual techniques!
Caution: This Fantasy Story contains strong sexual content, including Ma/Fa Coercion Consensual Heterosexual InLaws FemaleDom .
The following story may contain descriptions of sex and violence. If you are offended by this or if you are under the legal age of consent in your country do not read on.
I’ve told you about Marianne [SISLAW#1] and her lazy loutish husband Kurt. Well guess what?, he has finally got caught shoplifting and she has been charged as an accessory. Apparently Kurt goes into the toy department of a store and picks up a large box of something relatively cheap. He then empties the contents and then goes around filling it with small but expensive toys (e.g. electronic computer based toys). He then pays for the large but cheap box, then sells the more expensive contents at car boot sales. Well this time he got caught and since he’s already got a record for shoplifting, it looks like he’s in real trouble and serves him right too. It’s Marianne that I feel sorry for, she will probably get off with a caution, but she’s very upset about what he’s got her into.
To cut a long story short, I had arranged to go over to Marianne’s house to show some support. So there I am sitting in her living room with Kurt brooding in the armchair in the corner as miserable as sin watching some rubbish film on satellite T.V. (with a fraudulent card that costs less than half the price of the real thing!). Marianne was in a sleeveless white top with light grey skin-tight leggings that showed each sensuous curve of her long shapely legs that, like always, drove me to distraction. Suddenly there is a knock at the front door and I watched Marianne get up and go into the hall to answer it (okay - I watched her legs and shapely rear!). With some surprise I heard my mother in-law’s loud booming voice “How are you dear?, Isn’t it awful?, Well never mind I’m here now”. “Blooming ‘eck what’s the fat cow doing here?” Kurt muttered. The voices moved into the kitchen, no doubt for Marianne to pour her heart out and get some sympathy from her mother.
Let me tell you about my mother in-law. Despite being only 5’1” tall her girth is huge. Some of it is to do with big bone structure but most of it is due to being grossly overweight. A thick neck disappearing into large sloping shoulders, a wide back, big backside, a bulbous distended stomach covered for the most part by enormous large wide breasts that hang down low. Her arms were thick as were her short legs. She was much larger when I first met her - so large that she had difficulty fitting into a car seat. On advice from her doctor she lost a lot of weight and slimmed down, relatively speaking of course since she is still pretty big probably twice the size of an average man ignoring her height.
With 55 approaching she seemed to go through a second adolescence. Divorcing her much older husband, she amazed us all by going through a chain of boyfriends, many much younger than herself. What’s wrong with that? you ask. Well she isn’t exactly good looking. She has a large ruddy face with short curly dark brown hair, brown eyes, a large thick nose and a wide mouth. Her cheekbones are prominent but difficult to notice because of the looseness of her skin which hangs in drapes under her chin. Despite this she was never short of male admirers. Then one day last year she decided to move away to Devon on some wild whim to “start afresh” and we hadn’t seen her since - until now.
After about ten minutes Marianne entered the living room, red-faced and a bit tearful as if she had been crying. I felt like cuddling her and telling her that it would all be alright, but that’s not the sort of thing one does when her over possessive husband and mother are in the same room. Paula followed her daughter wearing a brownish green top, a khaki knee-length skirt and black high heeled shoes. Somehow she seemed different than I last saw her, but I couldn’t quite put my finger on it.
“There you are you lazy good for nothing” she yelled stomping across the room to where Kurt sat, her skirt swishing around her massive legs. Kurt was surprised as her thick left arm reached down, grabbed hold of his collar and effortlessly hauled him to his feet in one swift move. Now Kurt is a tall lanky bloke about 6’ tall who does jujitsu and is always boasting about how hard his abs are and can take any punch. Well it didn’t do him any good, my mother in-law’s thick right arm shot forward like a cannonball burying her large fist deep within his gut without any resistance going so deep it must have nearly reached his backbone. “Baarrhgh!” a short explosion of air and Kurt’s torso crumpled around mother in-law’s mighty fist. His legs seemed to turn to jelly beneath him and I’m sure he would have fell if it wasn’t for the grip Paula had on his collar. “How dare you involve my daughter in something illegal” she shouted at Kurt, his mouth moving silently like a goldfish, his face contorted in agony as he tried in vain to breathe.
I was too stunned to do anything but sit there and watch. “Mum!” Marianne cried out in alarm, rushing forward to her mother’s side. Too late, Paula’s large fist hammered hard into Kurt’s face jerking his head backwards in a spray of blood that gushed from his nose and mouth. The force of the blow caused his body to shoot backwards but was pulled back by her other hand on his collar as though he was on a elastic band. “I’ll teach you a lesson you won’t forget in a hurry” Paula shouted as she effortlessly held him upright, his own legs looking like they were not working.
“Mum!” Marianne screamed as her mother wrapped her thick arms around his lower torso pulling him into a crushing embrace. “Arrgggh!” Kurt cried loudly as his chest was forced into her voluminous breasts which moulded themselves around his body, looking almost as if they were devouring him. Although Kurt was taller than her, his feet were barely on the ground as she lifted and pulled him tight against her body. It was then I realised that her stomach no longer protruded as it used to but seemed a lot flatter. Then I noticed her calves, standing with her legs astride, her calves were big solid slabs of rock hard diamond shaped muscle - full and wide tapering down to her ankles. When did she get those?. An aura of total dominance emanated from my mother in-law as she stood legs astride crushing the much taller man against her large chest in her massive arms. I never realised that she was so strong but she was certainly turning me on with this exhibition of raw power.
“Mum please no!” Marianne pleaded, now in tears, tugging uselessly at her mother’s huge arm as it crushed her husband helpless. “Noooo noooo noooo” Kurt moaned, his head thrown back, his bloodied face a mask of pure agony. “Pleeeease” his hands beat uselessly on her broad shoulders and arms. “Jim do something!” Marianne pleaded. “He’s got to learn what happens when he gets my girls into trouble” Paula told Marianne “the same goes for you too Jim”. I shuddered as I imagined myself in those thick arms that were obviously much stronger than I ever suspected. Slowly she increased the pressure of her bear hug, pulling him right against her chest, her large breasts squashed either side of his body giving him none of their cushioning effect. “Noooo no please no” he was begging with tear filled eyes, pleading for mercy in a breathless voice as she crushed the air out of him. “Oh and thought you were a big tough man not a little wimp” she told him “I’ve only just started”.
Uncertain what I could, I stood up and tentatively put a hand on Paula’s large shoulder, surprised at how solid it felt. “I think you’ve done enough. You better put him down” I said nervously. “Don’t interfere Jim or you’ll be next” my mother in-law replied as she crushed Kurt’s body in her arms as though she were squeezing a tube of toothpaste from the middle. “Arghh!” Kurt screamed, tears cascading down his bloodied face as he squirmed in her mighty embrace. I put my hand on Marianne’s shoulder intending to comfort her and she turned into my arms and cried into my shoulder. “I’m the mother in-law from hell, you two” she said “and this just a small sampler of what I can do to you”. I couldn’t believe she could pull him any closer but she did, his chest squashed tight against hers, his legs dangling back not supporting him at all. “If my girls get into any trouble because of either of you” she stared me straight in the eye, was she unhappy that I was holding my sister in-law?, “this will be like a pinprick compared to the pain I will put you through. Understood?” she asked. “Yes yes” Kurt gasped his face turning red as she gave him a jolt more of her power. “Jim?” she asked. “Yes” I said in an awed whisper. For a moment Paula relaxed her grip and Kurt’s face showed relief then suddenly she squeezed, her mighty hug looking more powerful than before. He tried to scream, but nothing came out she must have crushed the last of his air out of his body. Suddenly he went into spasms, his arms and legs jerked violently, his head jerked back and forth with his mouth open in a silent scream. Then he went limp between her huge arms. Finally, my mother in-law dropped him to the floor.
It was only then that I realised that this exhibition of awesome female power had me fully erect and that surely Marianne could feel it. “Don’t waste your tears on scum like that love” Paula replied. “You should train him, show him whose boss” she said. “Will you be okay?” I asked Marianne quietly “I think I’d better get her out of here”. Marianne nodded and we ended our embrace. Paula’s eyes narrowed in suspicion as I said goodbye to her daughter. “Come on, I think we’d better go” I told my mother in-law. “Are you playing around with Marianne?” she asked bluntly as we walked down the path towards the road where we had parked our cars. “No, of course not. I was only trying to comfort her” I told her “Look I’ve got to go into the office first, do you want to come or will you go straight to the house?”. “I’ll come with you. There’s something we need to discuss” she replied.
Driving back to my office in the next town I couldn’t stopping thinking about the sheer power Paula had displayed whilst demolishing Kurt. Recalling the incident had me hard, had she always been this powerful without me knowing?. She never had calves like that before, believe me I would have noticed. I couldn’t wait to get her in my office and ask her. However it wasn’t to be. As I drew into the car park, I noticed a big black Rolls Royce, Sir Humphrey was waiting with John his bodyguard. Damn! I forgot that I had arranged to go over to Bristledown this afternoon to continue my investigations.
“Ah Jim, just popped over to bring you the plans of the manor that you wanted” Sir Humphrey said handing me a scroll of paper. “Right, I need to finish taking video grabs of the tape I shot at Lady Helen’s and transfer them to my laptop and I’ll be right over. In the meantime, why don’t you come in for a cup of tea?” I asked. I unlocked the door to my office and we all trooped up the stairs. Sir Humphrey and Paula made themselves comfortable on the sofa whilst John watched silently as I did the business with the I.T. About half an hour later when I had finished, Sir Humphrey and my mother in-law were getting along like a house on fire. “OK I’m ready to head over to the manor” I said aloud interrupting their animated conversation. “This charming lady is invited of course” Sir Humphrey smiled at my mother in-law who had her arm in his - how does she do it?.
Anyway, off we set. Sir Humphrey, John and my mother in-law in the Rolls with me following behind in my Ford. At the manor, Sir Humphrey took Paula on a tour of the Manor while I set to work. By having images of the contents of Lady Helen’s Indian room on my laptop I would compare them with the vast collection at Bristledown. Matches might be coincidence or might indicate the replacement of the genuine article with a fake during a break-in. I wasn’t really sure what I was looking for, I was really scraping at straws.
I searched the manor house room by room, meticulously checking each and every artefact of Indian origin against the information on my laptop. Occasionally I entered notes alongside various images as something or other occurred to me. I also compared the room layouts with the old plans of the manor which Sir Humphrey had given me in the off-chance of finding a secret room or something. By the end of the afternoon I had searched the whole house and apart from a few matches that might mean nothing, I had not found a thing. I was down in the cellar, the last point on my tour. Don’t get me wrong, this wasn’t a pokey little room underneath the house. This was a vast dimly lit chamber with ornate columns holding up an arched ceiling with racks upon racks of Sir Humphrey’s vast wine collection.
I was about to call it a day when I heard heavy footsteps coming down the stone staircase from above. I looked up and saw my mother in-law walking down the stairs. “So that’s where you’ve been hiding” she asked as she descended. “You might as well stay there, I’ve finished here” I replied. “No, no, I always wanted to look in the cellar of a stately home. Wow just look at all that wine!” she exclaimed. I put my laptop, notes and maps down on an old table that I had been using and waited in resignation for Paula to reach the bottom of the stairs.
“Just look at this place!. Isn’t it remarkable. I’d love to live in a place like this” she exclaimed as she walked around the vast vaults. “So? what have you found anything?” she asked in an excited voice. “No nothing” I replied. “You should come down to visit me sometime. It’s a marvellous place, fresh air, the open side, the scenery”. I switched off - I had heard this a thousand times, Paula tended to rabbit on in a self-centred spiel about her problems, her new boyfriend etc. etc.
Then she mentioned her new job “I’m a night watch security guard!” she said “that’s right, I’ve got my own uniform and torch and everything. I look very smart indeed. I patrol scrap metal yards and places like that. There’s a lot of money tied up in waste that has to be protected and I do it!”. An image of my overweight mother in-law in a tight ill-fitting security guard uniform patrolling a scrap yard came to my mind. She must have read the expression on my face. “What’s so amusing, it’s a very serious business you know” she said angrily. “I’m sorry but somehow the thought of you as a security guard doesn’t seem right. I mean what would you do if you came across some thieves” I replied trying not to laugh.
“I can take care of myself, you saw what I did to Kurt. in fact I’ve a good mind to show you” she said. “Ur no that will be fine. We’d better be going” I said remembering how she had demolished Kurt. I tried to back away but she grabbed my wrist, stepped forward and delivered an uppercut to my chin with her massive right arm. My head whipped back, bright lights exploded as my vision blurred and my head reeled under the blow which nearly dislocated my jaw. Still holding my wrist, she turned pulling my arm over her broad drooping shoulder and bent forward loading my body onto her wide back. For a long drawn out moment, my crotch slid over her ample backside, the sensation was very stimulating. The moment was gone as my body was thrown over her shoulder, describing an arc in the air pivoted around my wrist which she held. I cried out as my body slammed into the cold hard stone floor, burning pain searing up my back.
“I used to be in the Air Force you know, a long time ago” she told me as, still holding my arm, she lowered herself to the floor so that I was by her feet.”I used to do jujitsu. In fact I was quite good at it”. “My boss, she’s an actual aristocrat, insisted on a refresher course. It’s surprising how quickly it all came back to me” she said as she wrapped her short but massive legs around my right shoulder with her right leg going over my shoulder and around the back of my neck and the other leg going under my arm. “This is my favourite hold” she told me as she pulled my head down to the floor with her right leg, whilst pulling my right arm across her body, it was too strong to resist. She got the crook of her left knee over her right ankle locking my head tight between her legs, my neck sandwiched between the back of her thick thighs and her large muscular calves. “Urkkk!” I could hardly breathe as she pulled me closer to her body, my throat giving way to her surprisingly large and firm hamstrings that bulged enormously into my neck.
“You’re completely powerless Jim, totally under my control” she told me. It was true, she had me in incredibly powerful choke, I was helpless as she choked me against her massive hams. “I may not be very tall and I may be big built, but I can wipe you out in seconds if I wanted to” I heard her say. Folding her left leg down, she pulled my right arm towards her right shoulder and stretched her hips back whilst holding my arm. My head span, my vision blurred and I was suffocating. My body cried out for air but I couldn’t breathe. I could hear horrid croaks and gargles and then realised that it was me. Feeling light-headed, patches of blackness grew larger and larger. I was helpless, she had hold of my right arm and my left was trapped beneath my body. She tightened the hold and I slipped into unconsciousness.
I came around to find myself on the cold stone floor of Sir Humphrey’s cellar. Paula was sitting by the table looking at something on my laptop, surprising since she was previously computer illiterate. “Still think I can’t take care of myself?” she asked as she got up and walked towards me. I got to my feet as she neared. I was quite turned on by the thought of how my mother in-law had dominated me with her jujitsu. “What are you looking for here Jim?” she asked. “I honestly don’t know” I replied. She made a move with her hands, I thought she was going to hit me. In alarm, I reached out and grabbed both of her wrists. “Haven’t had enough er?, here get a load of this” she said as she forced her right hand against my thumb, the pain causing me to release my grip. Continuing her motion her hand shot out in a backfist strike to my temple. Pain lanced through my skull, points of light burst in front of me and my brain felt numb. I felt her turn and twist my right arm into an armlock and then a wrist lock. She twisted and bent my arm right up high forcing my body to bend forward. “Submit or I’ll break it” she demanded. “Arghh! yes yes I submit please” I pleaded as I felt my elbow being forced the wrong way.
She swung my arm up the other way high forcing me to stand straight. Stepping slightly in front of me, she swang my arm down in an forwards arc forcing my body to be thrown over her hip. I crashed onto the hard cold floor, crying out as the pain shot up my already bruised back.
Standing in front of me with her legs astride she removed her jumper. “I want to show you something else” she said “My boss gave me free membership of a women only gym. She wanted me to take up weight lifting”. She started to undo the buttons on her blouse “I wasn’t sure so but then I met the gym owner. She’s about my age and build except a bit taller”. As her blouse fell open my eyes were met with the sight of the large mounds of her upper chest and the incredibly long and deep cleavage between them. She wore a black leather corset, the front of which was laced leaving a wide gap all the down to her navel through which I could see her flesh - I was particularly fascinated where the lower part of her breasts met and then curved away beneath her corset. “That’s nice dear” she said looking at the bulge in my trousers. Red-faced with embarrassment I got to my feet unable to tear my eyes away from her massive mammaries straining for release from her corset. Then I noticed the necklace she wore with a small ebony figure of an many limbed Indian goddess - I’ve seen that before. It was exactly the same as what Lady Helen wore and Cynthia, the amazon barmaid I encountered [JIMP#8]. That train of thought derailed itself when she took off her blouse - what was she up to?.
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