Billy goes to practice.

When Billy arrived at the gym, it didn't take long for his coach Lucy to notice him. She came over to him immediately, looking hot in a pair of tiny orange workout shorts and a form-fitting white t-shirt. She was quite slim and not very tall, with medium-sized round breasts and a tight perky butt. But Billy knew that her unassuming appearance hid a real spitfire, based on the last time they'd sparred.

Now she had a concerned look on her face. "Hi Billy," she said. "You've missed our last two training sessions, where were you?"

Billy felt himself blush. The last training session, he'd skipped because it was the morning after his sister Anna had unexpectedly knocked him out, and he was still recovering from that. He could practically still see Anna's boobs bouncing as she bobbed and weaved out of the way of his punches. And he could still remember the power behind her knockout uppercut.

The session before that...well, that was right after one of his knockouts at Heather's hands. The second one, where he'd actually been trying to win. In that case, too, he'd been too woozy even the morning after to contemplate going to boxing practice. He started to get hard as he recollected his mom's clever fakeout and her relentless taunting after she got him again.

"Um...." Billy stared into Lucy's expectant eyes as he tried to keep his half-chub from becoming a full hard-on. "I had some other obligations, that's all." While imagining his own punch-drunk head sliding insensate down the bodies of his sexy opponents, his limp body turning into a puddle at their feet.

Lucy stared at him for a second, feeling like he wasn't telling the whole story...because he obviously wasn't. But she didn't pry, because it wasn't her business.

"Well, find someone to spar with. And Billy? Pick an easier opponent today, because you're probably a bit rusty," she said, then turned and walked away, giving Billy a nice view of her tight, fuckable ass.

She didn't even know how right she was. Billy wasn't just rusty, he was still hurt--physically AND mentally--from the prodigious beating Karen had laid on him just a few days earlier. And the manual labor he'd been doing at her house had made him sore in areas he'd never felt sore before.

But it was important to get back in the gym and give himself a dose of reality. He was losing touch with the version of himself that was actually a champion.

As he stretched and surveyed the gym for a likely opponent, someone he could beat but would still give him a bit of a challenge, a cheerful female voice interrupted him.

"Hi Billy! Long time no see!" the voice said.

Billy turned and saw the familiar face of a girl named Carly. She was a year or two older than him in school, and he remembered her being a loud, outspoken feminist. She had been the only girl to join the local boxing club, and she was very vocal about her opinion that girls could box just as hard as boys.

It turned out to be a very wrong opinion, because she never won a match. She had gotten knocked around in the ring by several of the guys, and Billy--at that time, almost a rookie--had given her the final pasting she needed in order to see reality. She hadn't come back to the club after losing to Billy.

In his memory, she wasn't super attractive. Average height, built somewhat thick, but with small breasts, frizzy hair, and an annoying demeanor, Billy had been out of her league.

Looking at her now, Billy couldn't discern much. She was wearing grey sweatpants and a baggy grey hoodie. But from what he could see, he could tell she'd had at least a little bit of a glow-up in the last year, because her frizzy brown hair was much more under control and her face looked a little less chubby than last time he'd seen her.

"Oh hi, Carly," he replied. They made small talk for a minute, during which time Billy considered whether she'd be a good choice of sparring opponent. Originally he was going to pick a male partner, knowing that his knockout kink wouldn't come into play. But maybe it would be better to spar with someone he knew was no threat to him?

As he continued to talk to her, he pretty much decided that it would be too risky sparring with a girl in a crowded gym. He was already weakened, it didn't make sense to take the risk.

He had already started looking around for a male partner when Carly sealed his fate with one elegant chess move.

"Wanna spar?" she asked shyly.

Billy stared at her for a second, surprised she'd ask him that after last time, when he'd left her curled in the fetal position on the mat with tears in her eyes. He searched her gaze for any sign that she was fucking with him.

Carly blushed. "I mean, I know it's a bit of a mismatch, but...it's just sparring, right? Neither of us will go 100%!"

Billy was caught in a trap Carly didn't even know she'd set. If he said no, she'd conclude he was afraid of her. If he said yes and lost, he'd be the laughingstock of the whole club. If he beat her up again, he'd be called an asshole.

All he could was agree, and win. "Sure," he said, trying to seem nonchalant. But his dick, which had barely settled down after his conversation with Lucy, was already hardening again. It was lucky he'd worn compression shorts today.

Billy and Carly got into one of the available rings. While Billy stretched a bit more, Carly stripped off her sweats, apparently already warmed up. Billy couldn't help but watch. First she pulled off her hoodie over her head, revealing a thin, salmon-colored tank top. Then, to Billy's surprise, she pulled the tank top off too, leaving her in just a black sports bra. Her breasts were small like Billy remembered, but they were round and perfectly formed. Her belly was quite a bit flatter and stronger-looking, with a hint of abs.

Then she slid her sweatpants down over her backside, facing away from him. She was wearing loose, short black shorts underneath, and her butt looked great in them, thick and firm. Her legs were still fairly thick too, but tanner and more toned than Billy remembered.

All in all, she was significantly hotter and stronger-looking now. Billy was already starting to second-guess his decision to spar with her as he watched her throw a few crisp practice jabs.

Carly caught him staring and grinned at him. "I've been practicing!" she said proudly.

"Where?" Billy said, trying to keep his tone casual. There wasn't another boxing club anywhere close by.

"I switched to mostly kickboxing, but my coach recommended I come here to cross-train," she said.

Billy didn't want to think too hard about how much Carly might have improved. She was already in his head, he didn't need it to get any worse. He put his gloved fists up to show her he was ready to spar, and Carly quickly did the same.

Billy's initial approach was defensive. He didn't want to overestimate Carly and accidentally knock her down. Lucy would yell at him and possibly suspend him. So he focused on standing his ground, maintaining a good guard and blocking her blows.

It didn't work for long. Carly was throwing bombs, hard hooks and crosses that were punishing his forearms. She obviously wasn't taking it easy, probably figuring she'd need to try her hardest just to make a dent in Billy.

Well, she was making more than a dent. Billy's arms, still sore from Karen's beating and the chores she'd had him doing, were starting to sting even more. Billy knew that if he continued to let Carly beat on him too long, his arms would be too slow to hit her later.

So he backed off, stepping back and trying to lessen the sting of her punches. A smile broke out on Carly's face as she stalked him down. She realized she was having an effect on him.

Soon enough, Billy found his back against the ropes, and he started to get even more nervous. Carly continued to wail on his guard, not too concerned about hitting him, just happy she was in charge.

With few choices left, Billy turtled up, letting her punch his arms and shoulders to her heart's content. He looked for an opening, and while he did, he got some glimpses of Carly's biceps and triceps as she punched, as well as her abs tensing. Yeah, she was still thick, but it was starting to look like mostly muscle.

Billy saw his first opening, a gap where he could fire a hook at her ribs. He threw his best left hook, but Carly's body was already twisting into her next punch, and he ended up hitting her abs instead. Damn, they were hard.

Carly didn't even slow down. Her own left crashed into Billy's elbow, and her next right slid in before Billy could get his punching arm back in place, slamming into his ribs. Billy made a little gasp of pain.

"You like that?" Carly asked under her breath, grinning even more now. She resumed happily hammering on his guard, slowly beating the resistance out of him.

Goddamn, only a minute in, and she was already crushing him.

Billy knew he had to turn it around fast, and he now knew a body blow wouldn't be good enough. He started to cower, slinking towards the corner and crouching slightly, making Carly taller than him.

It was a ruse. Or at least mostly a ruse. He was genuinely scared of Carly: he didn't know how strong she was or how long she could keep punching like this without getting tired. Clearly this wasn't the same Carly he'd fought before, this was a newer, sexier, stronger version.

But that wasn't why he was cowering. He wanted to make her overconfident and catch her off guard. A veteran's trick, and his experience suddenly seemed to be his only advantage. Luckily, it worked like a charm. As Carly chased him down, she left her chin open for a moment.

Billy exploded upward from his slightly crouched position, hitting Carly with a vicious uppercut. Not the sort of thing you'd do in sparring, but Carly had turned it up to 10, so Billy had to go to 11. The punch didn't connect perfectly, but it was more than good enough to snap Carly's head back. She backed up one step, the gap between her gloves widening slightly.

Billy saw the dazed look in her eye and he knew it was on. He was already throwing his next punch, a stiff jab aimed right at her hard nipple, which he could clearly see through her sweaty sports bra.

Carly's body winced at the blow, and Billy hit her with a cross to the face, driving her another step backwards. He knew it was now or never, and he followed her with more blows.

Now Billy was driving Carly back across the ring, and she was the one in trouble. Carly stopped before hitting the ropes, though. She leaned back, keeping her head out of reach of Billy's hardest punches. Then she shifted her left leg up in a weird crane-like move, her knee sort of blocking her body.

Billy had never seen a boxer do this, and he was confused. He was therefore completely unprepared for the breathtaking kick that she unleashed.

BLAM! Her bare foot slammed into Billy's solar plexus, driving all the air from his lungs and making him stumble back several steps into the corner. The smack of his body against the turnbuckle echoed throughout the gym.

Billy gasped for air and looked at Carly, who already had a sheepish smile on her face. Coach Lucy's whistle shrilled through the gym.

"No kicking!" she shouted at Carly. "This is a boxing gym, remember??"

Carly covered her face for a second and blushed, embarrassed. "Sorry Coach...just instinct!"

"Don't let me see that again!" the sexy coach yelled. And in a lower voice meant for Carly only: "Nice kick though."

Billy heard it too, and he honestly couldn't disagree. He was pissed that she had broken his advantage, though.

Carly let him have a few seconds to get his breath back, but as soon as he came out of his corner, she sprang out of hers, not willing to give him another advantage.

She had also apparently noticed that he wasn't going for her abs anywhere, and she focused on covering up her face and chest so that Billy basically couldn't hit her at all, at least not where it hurt. Billy tried the same thing Carly had, just throwing punches at her guard and trying to keep her pinned down.

The noise of the kick and the coach's yelling had attracted the attention of most of the gym, and they now crowded around the ring, ratcheting up Billy's nerves, while simultaneously lending strength to Carly, who hadn't been expecting to last this long.

Billy thought about how stupid it had been to agree to spar Carly. He should have gotten out of that conversation before she had a chance to challenge him. The reality was, she was fitter than Heather, bigger than Anna, stronger than Karen, and more experienced than any of them. The certainty of losing washed over him even as he swung punches at Carly.

Unlike Billy's pre-weakened arms, Carly's were standing up to his **** well, and his energy was starting to wane. Sensing it, Carly started tossing out the occasional punch. Initially Billy was able to block them, but it didn't last forever.

SMACK! Carly's fist connected with his ribs again, same spot, making Billy groan.

WHAM! Carly's other fist hit his cheek a glancing blow, still knocking his head to the side and disorienting him.

THUMP! A punch to the gut doubled him over, his gaze panning over Carly's hard, tan, unassailable body.

CRACK! An uppercut just as vicious as his own, caught Billy under the chin. He straightened up and stumbled back into the ropes, and Carly was all over him like a wild animal.

She threw a flurry of punches to his face and body, and Billy was far too slow to block most of it. She turned his abs to mush with a series of strong hooks into his belly. As his guard sagged, she switched targets to his **** head.

BLAM! BLAM! BLAM! Right hook, left hook, right hook, all to Billy's punch-drunk face. His guard dropped and his mouth dropped open. All it would take was one more punch to lay him out before her. Knocked out once again, at the conquering feet of yet another woman.

Billy could dimly see Carly winding up with that big grin on her face.

The shrill sound of Lucy's whistle cut across the gym again. A mixture of relief and humiliation overwhelmed Billy as he heard it. He knew he had lost...but at least Carly had to stop hitting him. He slumped against the ropes as Carly backed up.

"OK, you got him, Wonder Woman," Lucy said. "Find another victim."

"He's not knocked out!" Carly protested briefly.

"This is just sparring, you don't have to take it to a knockout," the coach replied. Seeing her disappointed face, Lucy said, "You did a great job though! And we all know you were about to knock him out! Now go find another partner."

Billy dimly observed most of the guys around the ring back off uncertainly. They had just seen Carly rip club champion Billy to shreds in a casual spar, and none of them wanted a piece of her.

Billy was still trying to get his wits about him as Lucy circled around to his corner.