I pull into a lay-by on a stretch of road between towns. Switching off the engine I get out then lock the door although there were no other vehicles about, other than a grubby rusty old white burger van. On a grass verge by the edge of a small piece of woodland are a few shabby plastic chairs and tables. It is a warm day so there is no need for a coat. Approaching the van I see a woman inside through the serving hatch with her back to me. Slender shoulders tapered pleasingly over a long slim back to a narrower waist before curving out to her hips. Wearing a grey T-shirt, the straps of a kitchen apron were visible as well as a pair of denim shorts tightly moulded to a nicely shaped backside. Mousey-blonde straight hair with natural sun-bleached golden highlights hung down pass the nape of her neck, well past her shoulders. Raised up on the interior floor she looked tall and willowy but I knew her to be 5’9” in her bare feet. “I’ll have a decaff cappuccino, please,” I asked. Turning around to face me, she stared down at me through black slim-line spectacles which magnified small narrow eyes with blue-irises. That amplified glare was intimidating and exciting at the same time although softened by a welcoming smile that pushed up the corners of her small slim mouth.

“You’ll get crappy instant like everyone else,” she replied in a coarse Home Counties accent.

“Fine,” I told my sister in-law in resignation.

I watched as she prepared the drink. Marianne had a long and narrow petite face with flat cheeks dominated by a long prominent nose. A small thin-lipped mouth sat above a narrow but deep dimpled jaw and looked very kissable. So much so, I had to resist the urge to kiss it every time I saw it. Blonde hair softly framed her face with a fringe above light eyebrows and fell over her ears, hugging broad cheeks and a swan-like neck to the front of her shoulders. Most men found her plain, mousey or dorky looking but I thought her attractive in her own way. I hadn’t seen her for a while and she seemed lot leaner and trimmer. Her arms, bare below the sleeves of her T-shirt were thicker than I remembered but firm and toned. Her forearms also had a little more brawn to them and as she turned around, her backside seemed tighter and more compact in those shorts. They also showed off her stunning long legs and she looked tighter around the belly with firmer sides. I told her so and she seemed pleased.

“Thanks, Jim,” she smiled. “I was going stir crazy, restricted to when and where we could go out to get some exercise. It was like a blooming Police state.” I nodded in agreement. The corrupt local council took a very oppressive approach using emergency powers to push through plans that were in their own self-interest, withholding aid money from Central Government, and hiring a private security company to patrol the streets handing out fines and quelling public objection.

“Then I found a set of weights that Kurt got but never used and exercised with them to keep trim. With the same tedious routine each day, it gave me something to take my mind off it all. I probably got a bit obsessive with it,” she admitted.

“Well the results look pretty good,” I told her, admiring her trim figure.

“Nice of you to notice,” she replied with a warm smile.

“So how’s business?” I was pleased to see that she was using a proper machine instead of a kettle.

“Slow and boring” she replied, turning side-on giving me view of a good sized bust. “When you let me help you, I didn’t expect to be still stuck in a blooming clapped out smelly burger van!”

“Most of the work a private investigator does is investigate. It’s not all excitement,” I told her. “Anyway, this is a great cover to keep an eye on sleaze-ball’s mansion,” I said indicating the big gated house on the opposite side of the road. “Any visitors?”

“Just the postman and a smug git in a Jag.” She stopped to take out her phone and sent me a picture.

“Diplomatic plates, probably American,” I said when I’d received the image. “We know sleazy took a mate’s contract from a minister worth £2.5m but the NHS received nothing.” I took the cup she placed on the counter. “I’ll see if I can find who it’s registered to but if he has diplomatic immunity, we can’t touch him.”

“Officially,” Marianne remarked.

“It’s not about beating up the bad guys,” I told her.

“The way I feel stuck in here makes me want to beat someone up. That reminds me, that’ll be £2.50.”

“I’m family!” I protested. “And that’s a lot for a crappy cup of coffee!”

“Do you want me to come down there and take it from you?” Those magnified eyes glared down from her elevated position in a cold hard face that I found sexy as hell.

“Yes please, as long as you’re playing,” I reply, excited by the prospect of getting to grips with her and experiencing the self-defence skills I paid for, supplemented by what The Salvation Army taught her.

“I won’t be,” she told me looking sexily stern and heading for the van’s rear door.

Descending from the van and walking around to meet me, I’m excited to see her long bare legs shown to their utmost by the smallest of denim shorts. They were slim, beautiful and in perfect condition with no signs of cellulite or unsightly blemishes and with a light natural tan. As she strode towards me, hard sleek slabs of toned muscle flexed in her outer thighs while I enjoyed the moving curves at the back of her lower legs formed by long semi tear-drop curves from slim ankles to deep long meaty calves. It was a shame she wore flat sandals instead of heels which would have really made those calves flex to the max.

“Come on,” I laughed nervously under her relentless glare. “Those lessons were for self-defence not offence.”

“Tough. Get a refund!” she was very good at acting hard.

“That’s close enough. Two metres remember?”

“Eff social distancing. We’re family!” the relentless stare from her amplified eyes was disquieting.

“The thing to remember,” she said, looking as smoulderingly tough as a small-faced woman in glasses can be. “Is the main thing they teach women at self-defence.”

Without warning a leg swung up between my legs! My balls tried to shrink inside my pelvic cavity but instead of agonising pain, the leading edge of her shin stopped with barely a centimetre to spare then gently pressed against my groin. Her unnerving glare never wavered as a slight smirk raised the corners of her small mouth.

“Is to pound a man’s balls hard.” I gasped as the shin slid slowly up and down the front of my trousers over my manhood making it stiffen whilst under Marianne’s unwavering gaze.

“And, to keep doing it.” The words formed in a sensual pout of her small mouth then fell as her shin continued to slowly rub my groin. “Until they break.” I was getting terribly aroused by my sister in-law’s playful tough-girl act as she worked me off with her raised shin but had dreadful feelings of guilt.

“You mustn’t!” I protested feebly, as my manhood stiffened, knowing that was her intent. I tried to push the shin away from my groin. The feel of her bare smooth skin either side of her hard shin-bone was exciting but it swung back up with a hard tap against my balls making me yelp.

“You touched me without consent!” she exclaimed. “That’s assault. I have every right to defend myself!”

“I was trying to defend myself from you!” I protested.

“Shoplift from me,” the spectacle-wearing blonde glared “and I’ll break more than your balls,” she warned in a hard tone.

“OK that’s enough,” I told her, alarmed by the determined look on her face and the enlarged eyes. She seemed so serious it was hard to tell if she was still playing.

I reached out my hands to her shoulders to try to push her back, trying to ignore how good they felt.

“Really?” she sneered. Her hands flew up to grab each of my thumbs. I yelped as she pulled them down sharply while twisting each towards the outside, effortlessly ripping my arms wide apart. I was startled as a knee shot up to waist height with the long shin, meaty calves and foot dangling beneath. With a bulge of hard sleek thighs, the leg snapped open like a flick-knife driving the foot fast towards my groin. I steeled myself for eye-watering agony but instead the foot slowed at the last centimetre to give me a hard tap at the base of my scrotum. Even that was enough to make me cry out, close my eyes and wince at the pain.

Dropping my thumbs, Marianne’s right hand shot across my front to grab the inside of my right elbow while her other hand seized my right wrist. With incredible fluidity, she twisted my forearm beneath my upper arm, causing my elbow to fold and forcing me to bend forwards. Twisting my arm to drive my hand out to the side with a clamp-like hold keeping me in place, I was helpless to do anything except stare longingly at the great pair of legs only inches from my face.

“HAI-YAH!” she yelled theatrically, making me jump and my dick lurch while yelping at the strain on my restrained arm. In horror a knee rose with the shin bent back then snapped straight in the blink of an eye towards my groin. Her toes stopped close to my balls then continued moving with another not-so gentle tap that made me cry out.

“HAI!” she yelled again as she held me bent double before her. The hard point of an elbow hammered the back of my right shoulder blade in an explosion of pain that made me yell.

The next instant I felt the side of a slim feminine body press against me then the back of a leg push against mine. Her calves hooked around my lower right leg and swept my foot from under me. Falling backwards, I land on my side because she still had hold of my arm. Keeping it vertically straight, my leggy sister in-law restrained me. Placing her right foot in front of my neck she lowered herself forcing me onto my back while the leg folded around the side of my neck with the back of her meaty shapely calves across the back. All I could do was watch, with increasing arousal, as the hot-legged blonde got lower until she was sitting astride my chest. I found myself on my back, looking up with my right arm wedged between the right side of my face and the inside of her left thigh. The other side of my face was against the inside of her right leg with the back of her thigh pressing down upon my throat and the calve behind my neck. Not only was she pinning me, sitting high upon my chest, but scissoring me with her legs in a triangle figure 4 while applying an arm-bar. This seemed pretty advanced yet she had applied it with confidence and ease. I felt embarrassed at being totally owned so decisively in a matter of seconds, with nowhere to look except up at her denim covered crotch as she sat upon me in total dominance. With her lovely long bare thighs boxing my head and my arm sticking up uselessly against one side of my face and her weight upon my chest, I had an absolute hard-on as Marianne looked down at me with smug superiority on her cold stern face and scary amplified blue eyes.

“That was easy!,” she teased.

“That’s enough. Get off me!” I demanded, although in truth it was not an unpleasant place to be.

“Make me.”

With that she pulled back my right arm with both hands around my wrist, stressing the elbow over her crotch. My chest tried to rise but was blocked by the leg wrapped around the side of my neck as she sat over me. She was totally in control in a very sexy manner and I had an aching throbber despite the pain!

“OK I give!” I cried. It felt like she was going to break my arm!

“Are you being bullied by your sister in-law? Are you going to cry boohoo?” she teased.

“You can have your money!” I cried, trying to act calm, although that is difficult when a woman is trying to snap your arm while sitting on your chest. The very act of pulling on my arm caused my throat to rise and press against the back of the firm thigh tightly folded across it and began to choke me!

“I was going to take it anyway. You can’t stop me,” she taunts.

Holding my wrist with one hand, I gasped as her other hand slipped into my front right trouser pocket and rummaged around to fish around for loose change.

“Is this a pound coin holder?” she chuckled giving my shaft a good feel through the pocket lining. “Do you like my thighs around your neck and being unable to escape? Can’t you speak? Are my legs too strong for you?” she asked needlessly for her lovely long legs were exerting a terrific power, choking me and making my head spin. “I know to treat a man really HARD” she emphasised by giving my rod a vigorous rub making it absolutely aching before removing her hand and pocketing the change she found there. “I love the look on your face each time I beat you. It’s about time you give me something more physical to do instead of being in the blooming rust-bucket smelling of chip fat. Isn’t it?” she said glaring down at me.

“Here! Pull in here! It works. It really works!” Scott exclaimed pointing out of the window of the black BMW.

“So where’s my money?” the driver asked as he pulled into the lay-by. “I ain’t playing games Morris. No money, no stuff.”

“It ain’t no game” Scott indicated the app on his mobile. Demonautica was all the rage. It led people into all sorts of adventures related to the terms they entered. “There he is!”

“That curly haired guy underneath that blonde bird got me money?”

“The dirty sod is frakking with his sister in-law!” Scott cried excitedly. “Quick, film it! They’ll be paying us for years to keep this quiet,” he smirked, with evil glee. +++ I was shocked as the crotch of Marianne’s shorts shifted forwards until it covered my mouth with the base of my nose pressed against the front.

“Isn’t it, Jim?” she asked again, stressing the arm she held while I tried to breathe beneath her. The denim was tough and unyielding to the features of my face but it was an extremely dominant position for a woman to put a man. More than just a face-sit, it asserted her combat prowess by scissoring my neck while trapping my arm. No wonder my dick was raging hard. Her crotch rose from my face and I gulped down air.

“Well?” she asked. Before I could answer it sat back down denying me air while her legs maintained a steady pressure. The crotch rose again after what seemed a long while.

“Yes” I gasped quickly before it could lower again.

“Oh Jim, you’re such a wimp” she laughed unwrapping her long legs from my neck. “But I love you. Like a brother in-law,” she added, then leant forward to give me a big long kiss that had my dick beating against the inside of my trousers so hard I was afraid I might cum! With a mixture of relief and disappointment I watched her rise and return to the van. Brushing myself down, I got up and walked back towards my car. Another car was in the lay-by and I was passing it when four men got out. Thinking nothing of it I continued before I heard footsteps behind me and something hard clubbed me on the back of the head. +++ The dorky blonde was wiping down one of the tables as Scott strolled across with Ben. She looked up at his presence and her face went pale. He could tell by her startled expression that she recognised him.