This is a true story about my first real f/m ballbusting experience that likely started my lifelong fetish. I've edited names, and obviously I might not have the conversations verbatim, however I wanted to share it (mostly like a journal entry for myself as my adventures have since expanded significantly since this Genises story).

My parents divorced in my late teens, and it wasn't long before my dad found a new girlfriend and moved in with her. Every other weekend I would go over to stay the weekend and found myself living with my two blonde stepsisters. Despite my fantasies, truthfully it was the youngest, Ashley, who was a true ballbuster, however Lisa occasionally joined in to a lesser extent as well.

Ashley was a fiery, wild young lady. She was about a year younger than me, and Lisa was about a year older than me. Ashley was always headstrong, and demanded attention. She seemed to have something to prove and was quite fearless. Lisa always had more of an older sister dynamic, for the most part she took on more of a cheerleader role. 25% of her would express an "OMG Ashley, you shouldn't hit him there" attitude, but 75% of the time she'd burst out laughing and Ashley would be really fuelled on to impress her sister with her antics...but that's not really part of this story.

To set the stage, understand that despite me being 19 and Ashley being 18, we were both "late bloomers" sexually. At this stage of our lives we weren't sexually experienced, and "ballbusting" was NOT something that either of us fully understood to be fetish. I felt a chemistry between her and I and I knew she had a crush on me from day one.

Over the months it became fairly common that me and the sisters would find ourselves together watching TV in the basement rec room as our parents were out doing errands or work in the garden, and we'd end up getting into mischief. We would tease one another and get into play fights. I'd sit on them, they'd sit on me. We'd push and shove each other, throw pillows around, and tease one another as a way of flirting and keeping things fun.

I remember the very first "hint" of ballbusting was introduced to us via a wrestling video game on Nintendo 64. It was a multiplayer game and Ashley had discovered a female wrestler named Chyna who had a devastating move where she'd drop to a knee and launch an uppercut up between the legs of my character. The Low Blow would be emphasized by a "DING!" sound effect, and my character would drop to the mat clutching his balls and writhing in pain. Admittedly, it was pretty funny, and Ashley and Lisa both thought it was the Best. I'd huff and puff and call them cheaters as their video game characters relentlessly blasted mine with ballbusting maneuvers, but truthfully I was starting to find the idea of being hit in the groin by a female a bit exciting. Ashley was also developing a fascination with boys "weak spots".

The next weekend that I returned, Ashley had created her own custom wrestler on the video game and named her "The Nutcracker". She armed her with as many groin attacking moves as the game had so she could torment me as we played. As the three of us battled on the video game I came to learn that Ashley had actually kicked a boy in the neighbourhood, and this of course secretly drove me wild.

"Think I should use this one on Eddy?" she teased as The Nutcracker set my character up in the corner with his legs spread by the ropes before running up and punting him right between the legs. The two laughed at the idea.

"You kicked your neighbour in the nuts?" I asked, trying not to sound overly interested.

"Don't mess with me!" Ashley teased, shooting me a playful glare and glancing down at my junk.

Lisa added, "Ya, he was being a little dick though, he deserved it".

I reached over and placed a couch pillow over my crotch, "I'm just gunna put this here for protection".

The three of us laughed as the sisters jokingly agreed it was a good idea.

It was the next day that the epic encounter happened. The house was a multi-level-split, I had a makeshift bedroom set up in the basement, and at the top of those stairs was Ashleys room, so I'd pass it every day. It was also a bit secluded from the upper two levels where the kitchen and living areas were, and the other bedrooms were on the top level so the parents rarely stepped foot past the landing to yell at us to come up.

As I peeked in her door she was laying on her bed reading a magazine. Her fashion often replicated the popular girl bands of that time, and on that day she was clearly inspired by Britney Spears with a white blouse, a short black skirt and a clunky pair of Mary Janes upon her stocking covered feet. Not only was she dressed very similar to the pop icon in her debut video, but she was listening to her CD as this fantasy played out, so I've always had a special connection to her hit song.

"Get your filthy shoes off the bed!" I teased, obviously not having any jurisdiction over house rules (as it was her moms house), but it was normal for us to tease one another to entice a playful confrontation.

Ashley scoffed at me as she tossed her magazine aside and sat up, draping her legs over the side of her bed to ensure I wasn't treated to a peek up her skirt. "They're brand new you wiener! And I'm just breaking them in."

I could tell by her mischievous smile that she was up for a play fight, so I continued to tease her. "You can't break in shoes by laying in bed with them you lazy bum!" With that I strode into her room, and playfully pushed her back down onto her bed, and pinned her down by her arms, "and don't call me a wiener you little brat!"

Ashley glanced down to my crotch and smiled up at me, "You better let me go or I'll hit you where it counts!" My legs were straddling hers, I knew I was compromised, but she'd never hit before so I wasn't overly worried.

"You wouldn't!" I dared her.

I'll never forget how her eyes lit up, "Wanna bet?" Before I could answer she gritted her teeth and slammed her knee hard up into my dangling orbs.

The pain was intense, but what I still remember to this day was 1) She really had no mercy. Since this first encounter I've been busted by dozens of women and 95% of the time they start off super light and gradually get harder and more confident when they see I can take it. I would have guessed the first time she hit me in my privates she might go fairly light, just to warn me, but she put her all into it. And 2) She really seemed to want to bust me, like she'd been planning it.

She laughed hysterically as I took a step back, grabbing my balls in pain.

"I warned you!" she demanded, still laughing at my response.

I was back to standing in front of her, but my legs were now snapped together tightly as I waited for the waves of agony to subside. It was the first time I'd been hit there by a female who was truly targeting my manhood, and despite the physical pain, there was a higher level of sexual excitement coming from the fact that a hot young woman had connected with my sexual organs. To add to the excitement, she looked super hot, and as she sat up on the edge of her bed, she crossed her legs and showed off her brand new shoes. I hunched over humiliated before her.

Ashley was truly a Brat, and I could tell she wanted more. I was this far along, so I figured I'd try to push it even further.

"That wasn't so bad-" I lied, as I reached out, opening my hands towards hers in an attempt to test her upper body strength.

"Oh really?" Ashley smiled broadly as she uncrossed her legs, and reached forward to grasp hold of my hands. She pulled me towards her, forcing me to lose my balance and step forward, subsequently widening my stance for balance. In one smooth motion she kicked up hard into my groin. As she held my hands away to ensure a clear shot, the smooth leather of her Mary Jane exploded into my already sore testicles. Even after connecting, I remember the pure joy on her face as she continued to hold her foot up against my compressed nuts as the waves of agony hit me.

After a few agonizing moments of smiling into my eyes and absorbing the contorted look on my face, she released my hands so they could cradle my busted balls as I dropped to my knees in front of her.

"That's gotta hurt!" she teased, as I looked up at her pathetically. 

It really did hurt like hell, but I remember I over-sold it because I loved how powerful she looked (and likely felt) from seeing me drop to my knees in front of her.

"Yup," I replied in a somewhat comical high pitched voice, "You cracked my eggs!" With that I crumpled over into the fetal position.

That REALLY did it for her, and she laughed louder and harder then I'd ever heard. In that moment I think I accomplished something special, as I had subconsciously let her know that attacking my groin was okay and even fun, and I wasn't going to get mad or get her in trouble. Yet I obviously didn't straight up say I like it, or scare her away by being creepy. That being said, I do remember that as I lay there and she continued to torment me with playful kicks and taunts, I needed to utilize my curled up position to ensure my boner was tucked up into the waistband of my boxers, so it didn't become obvious through my jeans.

Eventually the pain subsided, however my hard on remained, so when I rotated myself to my back so I could finally look up at her I kept my hands covering myself as an added measure of privacy, which of course made total sense in the aftermath of the kick. I still remember looking up at her as she sat on the edge of her bed looking incredibly proud of herself as she snickered down at me, her older step brother, down for the count with one simple strike.

"OMG Scotty, does it really hurt you THAT much? You look pathetic!"

I groaned as I repositioned myself, giving her another opportunity to giggle at my pain. "No," I lied (making it an obvious lie), "I have Balls of Steel, I hardly felt your weak little kick!"

This was another genius phrase that sparked Ashley's competitive / adventurous attitude, and she immediately shot up to her feet ready to pounce once again. "Oh really!?" she challenged me as she half-jokingly positioned herself between my legs and wound up another kick. "How about we see how many you can take before you Do feel it!"

As tempting as her challenge was, I knew that straight up accepting it and spreading my legs would likely make me look like a pervert and my secret would be very exposed. Instead I kept my legs closed and my crotch covered as she teasingly went about trying to pry my legs open. That went on for a few minutes, and I remember she kept taunting me with the balls of steel comment.

"Come on wiener, let me work my new shoes in on your balls of steel!"

We were both laughing as she kept trying to open my legs long enough to get a kick in, but I wouldn't allow it. Before I knew it she was overtop of me trying to step down, forcing her Mary Jane through my knees and into my crotch. As I squirmed around trying to stay covered a few light stomps managed to collide with my hands.

"No! Not the dreaded Gaspedal!" I exclaimed.

"What's a Gaspedal?" she asked as she gave up trying to connect with her stomps and instead pinned her knees atop my chest and began trying to pry apart my knees with both hands. I was giggling quite a bit with nervous excitement. I had never experienced an attractive girl trying to wrestle her way to my man bits, and even though her goal was to hurt them, it was still very erotic for me. Her arms were more nimble than her legs, and she quickly worked her way to my hands which were desperately trying to protect my balls (and also conceal my boner).

"No, I can't tell you because a Gaspedal might actually hurt my balls of steel" I replied between laughter and grunts as I tried to evade her prying fingers.

"Tell me!" Ashley demanded, as she pressed down her hands atop mine, pumping her upper body weight into my groin. "Tell me what a gaspedal is or I'll just squeeze your nuts until you tell me!". Her fingers wrapped around my hands squeezing, and although I don't think she actually would have grabbed me (she never did seriously attempt a grab as it's a bit more sexual touch), however I was quite worried that she might get close enough to detect my hard dick. "What is a gaspedal!?" She kept pumping down with her weight and squeezing my hands as my nervous laugher almost allowed her to break through my cover.

"Okay, okay! Stop and I'll tell you!" I replied, and she finally removed her hands from between my legs and let me catch my breath as she plopped to the ground beside me, intently listening to my description. "It's like a wrestling move, where they grab the guy by the ankles, spread his legs and use his you know what like a gaspedal of a car..."

Before I finished a smile had exploded across her face, "OMG Scotty, you need to let me try this!" and she was back up to her feet and grabbing ahold of my ankles. I couldn't believe this was unfolding. The gaspedal maneuver was something that had become a bit of a fantasy of mine, but obviously I had never met a woman wanting to try it on me before. The excited energy of the whole situation had me in a weakened state. I was partially in pain, partially turned on, and overall a bit humiliated and overwhelmed by the sudden power swing from my younger step sister.

"Come on Mr. Balls of Steel! You can take it!" she teased as she spread my legs apart and placed the cold, smooth sole of her Mary Jane firmly on the back of my hands that covered by cock and balls.

"Fuck," I complained, "you really are Ashley the Nutcracker!"

"I am levelling up from Nutcracker to NUTCRUSHER!" she replied as she leaned forward applying more weight onto her leg. I was forced to use my hands to grasp her ankle in an attempt to control the pressure stepping down on my crotch and the hard surface of her sole dropped down, flattening my rock hard cock with the front of her shoe and grinding down on my balls with the clunky heel. This memory is forever locked in my brain as I remember looking up at my gorgeous step sister, wearing this cute little outfit, triumphantly spreading my legs and stomping my groin as the Britney Spears song - Oops I Did it Again blasted from her CD player. She was a complete Brat, twisting and stomping her Mary Jane into me with every word of the chorus;

"Oops I -"

CRUNCH!

"Did -"

SQUASH!

"It-"

SQUISH!

"Again!"

STOMP!

My balls were done, and she was still leaning in, twisting her foot into my nuts like she was trying to put out a cigarette. All the while she was laughing down at me as I desperately tried to reduce the pressure that was flattening my entire junk. I looked up in agony, but couldn't get a word out.

The torture climaxed when after what felt like an eternity (but in reality was probably only 20 seconds), she released her hold on my ankles and stepped her full weight up onto my squashed balls. She raised her other foot up behind her and bounced her entire weight down onto me. My balls felt like they were about to burst, and the smooth sole of her Mary Jane flattened my engorged cock to my pelvis. With each bounce my cock began to quiver and spasm.

"Think I can POP them!?" Ashley teased as she smiled down at me as she literally bounced her entire weight down, crushing my manhood.

I could no longer take the pain (or the pleasure) and as she bounced the sole of her school girl shoe down on my dick and balls, my cock began firing out loads of cum. With all the strength I could muster I rolled to my side, causing Ashley to collapse back onto her bed where she burst out laughing as I curled up in pain on the floor. My cock pumped load after load into my boxers. I cupped myself in agony, but also to ensure my quivering dick, or soaking wet boxers couldn't be detected by my attacker.

"Did I do it!?" she teased, "Did I POP your balls?" Ashley asked between fits of laughter.

All I could do is lay on the floor at her feet as my body convulsed in an incredible intense array of pain and pleasure.

I remember I had to wait for her to lose a bit of interest in me, before I could eventually rush myself into the nearby bathroom to clean myself up. When I came out she was waiting for me and for the first time she was showing just a tiny bit of concern and looking just a tiny bit guilty as she asked, "You're okay right? I didn't really break you did I?"

"I was a bit worried," I lied, acting like I'd gone to the washroom to make sure they were okay, "but it's okay, they're still made of steel" I teased.