It’s over in an instant - Anna wins

With their gloves up, circling each other behind the closed door of Anna’s bedroom, the two siblings observed each other cautiously. Both waiting for an opportunity to get in close and start really boxing.

“I’m gonna fuck you up,” Anna breathed, almost speaking to herself, trying to calm her excitement and nerves. Was she shaking a little? “You’re going down. You can’t win. You can’t win…”

Billy set his jaw defiantly. As the two siblings slowly circled each other, he threw out a quick combo at the air, shadowboxing fast, elite punches to get himself ready. To remind himself who he was. He was fucking Billy, the undefeated champion. This was his little sister. She shouldn’t even stand a chance.

Anna watched him closely as he shadowboxed, trying to hype himself up. Wow, he really could move his hands fast… The skill gap between them was obvious.

Billy glared at her over his quick fists, and spoke with all the confidence he could muster.

“Y-You little nerd, don’t get cocky. I-“

This was getting to be too much. Not wanting to waste any more time getting in her own head, Anna rushed forwards, ready for the fight to just start already. She needed to win this, and every hit she could get in would count. An early lead would be just what she needed.

Taking a few rushed steps forward, Anna was on him. Closing her eyes, she threw a right hand with everything she had. Billy was caught mid-word as his sister suddenly punched him in the face.

POW!

The padded knuckles of her glove bounced off his chin. Billy’s eyes widened in shock, mouth falling into an embarrassing ‘O’ as the unexpected shot rocked him… And then down he went, his legs suddenly giving out beneath him.

Billy, for all his skill and muscle, toppled face-first onto Anna’s bedroom carpet, collapsing into a limp pile at her feet. One and done. The fight had barely even begun before Billy was anticlimactically finished by Anna’s right hand - her nerdy, barely trained little fist.

Anna gasped in awe. The champ was dethroned again. Totally asleep before his triumphant sister. Face smushed embarrassingly against her carpet.

All the nervousness washed out of Anna in an instant. After her punch landed on his chin, she had stepped back ready for retaliation, only for her older brother to collapse in limp silence. Utter humiliation! Had she seriously just…?

Anna laughed.

“What the FUCK?”

She stared down at the crumpled heap of her older brother.

“You went down so easy!” she giggled. “What the fuck is WRONG with you?”

Here she was, hyping herself up and getting nervous. And one punch deep, the big bad champion was already collapsed at her feet. She had been expecting a much more difficult fight than that. Was he really **** already…?

An amused, disbelieving smile on her lips, Anna crouched down beside him. Reaching out with one gloved fist, she lifted his chin by the padded knuckles to check him out, and confirm the knockout.

Eyes closed, mouth open, body limp… Yep, he was done.

“Wow. That’s sad.”

Anna retracted her hand, and let big bro’s head fall back to the carpet. She stood up, looking down at him in amazement. Had she really been scared of this…?

What had she been so nervous about? He just got fucking oneshot! What a scrub!

Shaking her head, Anna chuckled as she undid her gloves. With the fight over, she pulled them off her hands and walked towards where her phone was propped up on her bookshelf to record the whole thing. Picking up her phone, she got a quick downward-angle view of her older brother sleeping in defeat before she stopped the recording with a laugh. Fucking humiliating.

Anna sighed, shaking her head and looking down at her phone.

Well, that was easy. Should she just send off the footage now, or…?

She smiled, going to her phone’s photo library to watch the knockout again. Everything was perfectly in frame the whole time. You could see the whole thing. Her charge, her punch, his fall… Even the way his head jolted back from her finishing blow was captured amazingly. It was perfect.

“Y-You little nerd, don’t get cocky. I-“

Billy’s voice played through her phone’s speakers. And then POW! Anna laughed as she watched the hilarious sight back, and replayed the KO a few more times. POW! POW! POW!

“Call me a nerd, huh…?” Anna chuckled to herself.

God, watching it back, he went out almost instantly. It really was one and done. She’d barely even pulled her fist back before his legs were buckling. Anna laughed again. Then, she paused. She glanced over at Billy’s fallen body, facedown on the carpet.

Anna’s face scrunched up. Something felt off to her. Setting her phone down on her desk, Anna sat and reclined in her wheeled chair to think for a moment.

What was going on? He hadn’t gone down that easily in their first fight, and that was when she was using heavier gloves. Why was big bro getting one-shot KO’d now? It was too easy. Did Anna’s newfound confidence give her what she needed to just plant her feet and throw hard shots? Was she getting stronger? Or was he getting…?

Spinning her chair around, Anna opened her laptop. She decided she would do a bit of research while big bro was floating in la la land on her bedroom floor. After all, he wasn’t going anywhere.

A few minutes passed, typing away on her laptop, reading through sports articles and boxing forums. Normally she would never touch those places, but her keen academic mind wanted answers, and she would have them.

Her eyes scanned the screen with intelligent efficiency. Between watching some videos, a recent discussion post on a boxing forum caught her eye.

Just got knocked out in my last fight. Coach says I can’t box for the next six months :/

That sucks dude. 6 is harsh. I remember my first time going out, I only got a 3 month suspension.

“Hmmm…”

Anna glanced back at Billy over her shoulder. Yep, still ****… She went back to her screen, this time the news articles.

Glass Jaw Syndrome: Legendary boxer hangs up the gloves after 3rd consecutive KO loss.

TRISTAN DANVERS KO’d AGAIN! Trying to avenge his loss in an immediate rematch spelled disaster for this up-and-coming prodigy. Is his future in the sport at risk?

A chat with the champ: MMA Fighter explains why he doesn’t do hard sparring anymore.

Anna nodded as she finished the final article. Her pussy was dripping in her shorts, but her quest for knowledge helped her ignore its needy begging for now. She spoke to herself, under her breath.

“Ohhh, I see. So the sooner it is after you get knocked out, the easier it is for it to happen again…”

Anna recalled how Billy had admitted to letting their mom knock him out, on purpose. That wasn’t that long ago. Then what did he say happened? They fought again, and she beat him a second time? Then Anna came home, took those loaded gloves onto her fists, and…

It was starting to come together now.

“Have you just gotten knocked out too much? Are we making you weak, or something?”

Anna wheeled her chair away from her desk to where Billy lay, motionless on her bedroom floor. Sitting above her **** big bro with her hands in her lap as she looked down at him. God, he was such a strong, muscular athlete. Yet here he was…

“So that’d be why you got fucking rocked by a slap the other day, then…” Anna smiled. “Wow, bro. You might’ve gotten your entire career ended by our literal mom. Pfffft.”

She had wanted answers, and it looked like she had got them. She wasn’t imagining it. The champ really was a piece of cake to KO now. That first time Heather had punched him to sleep had thrown everything off course for him. If only he had a bit of time to rest and recover, he might get back on top again, but...

Anna smiled as a thought crossed her clever mind.

“If I time it right, I could probably just knock you out in front of Sophie. A live performance. That would show her I wasn’t lying.”

Anna leaned back in her chair, thoughtfully. Her pussy twitched in her shorts, and a small gasp escaped her lips.

“Maybe… Maybe she could play with you, to make sure you were done… And then maybe she could play with me after…”

Anna’s blushing face was burning hot now, as she pictured getting some one-on-one time with Sophie after knocking out her crush. Those big boobs… Not to mention, for one reason or another, reading all of those articles about boxers getting weaker and weaker, had made the sexually curious girl excited. Watching videos of big strong men getting tucked in to sleep by a punch to the chin, hearing the crowd moan in sadness as legends of the sport became glass-jawed chumps…

Anna paused. That was it. She had the idea. She knew what she was going to do.