Billy turns it up a notch.

It didn't seem like Karen was about to give up. It didn't even seem like she'd been hurt by the punches he'd thrown so far.

So Billy decided to REALLY teach Karen a lesson. He would leave her a knocked-out mess on the floor if that was what she really wanted.

He circled around her, eyeing her hot body and looking for an opening. It didn't take long: Karen threw a careless left cross that left her ribs open. Billy slipped her punch and came in with a hard left hook to Karen's ribs.

SMACK. "Owww," Karen moaned as she covered up and backed up. Billy didn't stop. He hammered her guard again and again, then when she brought it low, he punched her twice in the face. "Ughhhh! Ughghh!" Karen cried, her head snapping back, her ponytail swishing from side to side at the impacts.

Nobody was cheering for Billy, but he did hear one quiet voice say "Get her!" Must have been some mom with a particular vendetta, someone who'd been humiliated by Karen the way she'd tried to humiliate Billy today.

When Karen managed to get her guard back in front of her face, Billy switched to going low, firing several hooks into Karen's undefended belly. Karen gasped and moaned and stepped back at each hit, but she didn't go down. Billy had to admit she was tough--he'd gone up against trained male opponents who'd crumbled after this kind of combination.

Billy shoved her backwards with his last punch, sending her stumbling, and turned to the circle of enraptured MILFs. "When you get an advantage, it's important to press it. You don't want the other boxer to turn the tables because you took a second to catch your breath."

Of course, the time he took to explain this meant he was breaking his own advice, and when he looked back at Karen, she was already charging at him. She fired a big overhand, and Billy didn't have time to dodge it. He blocked it with his forearm, and a stinging SMACK echoed throughout the gym. God, her hits were so hard, he thought. Not noticeably slower or weaker than when they'd started, despite the amount of hammering he'd done on her own forearms.

Karen followed up with a series of wild punches, and all Billy could do was hunker down and block as best he could. With his gloves in front of his eyes, he couldn't see her movements very well, and he felt like he was in a whirlwind of punches, bashing his gloves into his face, stinging his arms, bouncing off his elbows. He was **** to give up ground in response, and soon found himself against the ropes.

Billy tried to stay calm as Karen flailed at him. She had to run out of energy at some point, and when she did, he intended to be in one piece to capitalize on it.

One of her hooks got around his elbow and slammed into his belly with a meaty SMACK. Billy let out a little involuntary whimper and shifted to the side. The MILFs gathered around them oohed and aahed, and Billy saw a quick flash of Karen's satisfied smirk between his gloves.

Then Karen finally overextended herself. She drilled a second hook into Billy's side, but he caught it mostly on his elbow. It still hurt, but not as much as Karen clearly thought it did. She was slow to pull it back, leaving an opening in her own guard. It wasn't as good as Billy was hoping for, but it was good enough. He fired a punch into the gap, hitting Karen hard right in her ribs, harder than he'd hit her so far. "AAAHH!" she cried, lowering her guard in a panic. Billy took the opportunity to jab a punch right into Karen's face, fast and light, just enough to stun her. Karen's eyes went a little blank, and her fists shifted outward.

Billy saw another opening: her perfect, juicy tit was open for the first time. He hit it with a powerful cross, crushing it into Karen's chest and making her scream in dismay. All the MILFs let out little noises of commiseration as they saw him pancaking her tit. Her guard was nonexistent, and Billy hit her with his best uppercut, slamming her underneath her chin, almost lifting the arrogant MILF off her feet. She stumbled back into the corner, almost going down for the count, but managed to stay halfway upright with the help of the ropes.

Even though she was starting to hurt him, Billy was still confident he had the upper hand, and he couldn't resist a little more instruction. "That right there was a strategy called rope-a-dope. You cover up and defend and let your opponent punch themselves out of energy, wait for them to make a mistake. Then you capitalize on it," Billy explained to the MILFs.

He looked over at Karen. Surprisingly, she didn't look done. Which was a little scary, given that Billy had just hit her with the best uppercut in his arsenal.

"Want to call it a draw?" Billy asked. He didn't want anyone to later accuse him of beating up on an older woman.

"No chance," Karen said. "I've got you right where I want you," she added.

Billy snorted. "You and I see things very differently, then," he replied. It was for the best, though. He didn't want to call it a draw either.

He prepared himself to clash with Karen again. This was easier than fighting Heather or Anna. With his mom and sister, he actually cared about them, and didn't want to hurt them, and so it was always tempting to pull his punches and go easy even when they were kicking his ass. In this situation, Billy no longer felt obligated to pull his punches, and he was relishing in the pure aggression that he was unleashing on Karen.

Unfortunately, she clearly felt the same way, and she wasn't done unleashing her OWN aggression on HIM.