Cautiously

“I- I don’t want to talk about this, Anna…”

“Was it a real knockout? Did you really go out?”

Billy’s face burned red. He did, but how was he supposed to tell his younger sister that? That she’d hit him so hard he fell asleep… All the while, he needed to keep the fact that he had loaded those gloves quiet. After all, if she knew that, then she’d have to ask why. From there he would either have to lie about being a cheat at boxing, or he’d have to tell the truth about how he had let their mom knock him out for wank material, and now the whole thing was out of his control. But he could tell by the look on Anna’s face that she wouldn’t be satisfied until she got some kind of answer.

“Y-Yes, Anna…” he admitted, his eyes shifting away from her confidently glowing and electrically charged eyes. “I really- It was a real knockout.”

A surge of pleasure shot up Anna from her clit to her heart, and she let out a quiet mewl involuntarily as the first of her questions was answered. She could tell Billy was being honest by the shame on his face.

“Oh my god…” she breathed. “Then… How? How did I… beat you? You’re supposed to be good…”

Anna purred and whined as she awaited the answer, almost silently and far too quiet for Billy to pick up. At the same time, she shifted her hips nearly imperceptibly, dragging her wet and wanting pussy lips across his body and sending shocks of pleasure up her back. Gawd… she was pinning him down. Even when he’d struggled earlier he couldn’t get away. Big bro, her sporty, physical brother. She’d knocked him out and now she was holding him down.

Billy looked away again.

“S-Sometimes it can just happen,” he tried to explain. “Smaller people beat bigger people all the time in boxing, if they’ve got more skil-“

Billy stopped, realising what he was about to say. Shooting a look over to Anna, she didn’t look like she was about to call him on it, just waiting for his finished answer.

“…Or sometimes people can just get lucky. It happens. A punch that happens to land on the right spot, when somebody doesn’t expect it, doesn’t need a lot of power to knock them out.”

“And it happened to you?”

Billy gulped. “Yeah, Anna.”

Anna squeaked near-silently again. Billy might not have seen it, but there had certainly been a reaction to him almost saying she was more skilled than he was. Even if Anna didn’t truly believe it, hearing her sibling rival almost say that was fucking hot.

With that, there was just one more question to answer before Anna’s body was unlocked and able to have her hard-earned orgasm. Billy’s seeming fear of her. As for why their mom had been so into it, that was something Anna would need to ask her about later. She was quite interested to hear Heather’s answer. But until then, only one question was left.

“So then, why were you so afraid of me? Your punches didn’t even hurt me, and you looked terrified… There’s no way you were just worried about me getting lucky.”

Shit. That was a hard one to answer without giving away the big secret. Billy took his time thinking, as his younger sister sat up on him and breathed hot breaths, waiting for his answer in heat.

“I just…” Billy slowly began. “I just know how good you are at picking things up quickly. You’ve always been better at me, ever since we were younger. I only got to have sports to myself because you didn’t care about doing them. And I was scared that you might just start out and be better than me. I could tell after I was done teaching you that you were already as good as some of the guys I spar with, technique-wise.”

Dammit, Billy thought. Sucking up to her like this was a real pain. But he had to. As much as he hated acting weak, or acting like his know-it-all sister was better than him, it was better than having the real truth come out. Playing to her ego was the only way, and it would give a reason for why he was so slow and nervous to answer for now. He could just correct all of this later, but while the brat had him pinned down, he needed to play on the side of caution.

“I was scared you’d already be better than me in the one thing I had over you, Anna. And I guess I was right. You knocked me out.”

Anna gasped as another shot of pleasure spiked up her body. Was that true? Had big bro really been living in the shadow of little sis? It would explain that “more skilled” slip-up he’d almost had. It would explain a lot, honestly. And it sure made Anna feel good to hear she was already on-level with the guys Billy trained with, only one day into training. She had no point of reference, but she had always picked things up quickly… Maybe she really was just a great boxer now, better than the boys at school. Better than Billy. Holy shit, was it real? Was she really a better boxer than her big, dumb, muscly brother? She had knocked him out. It was possible… Billy had made his best case for it, Anna just had to believe it.

But did she? Did that answer unblock her final barrier to orgasm, and now she could let it all out? How would she make herself cum? How would she celebrate? And how would she carry on with this newfound knowledge of her brother? The brother she’d knocked out cold. The brother she’d finally beaten. The brother who wasn’t her rival anymore. If what he was saying was true, then she hadn’t just knocked him out. She could knock him out again.

Or, otherwise - if she didn’t believe him, how could she validate his claims? And how could she punish him for lying to her…? Or maybe, she could try to do both in one.

Anna sat atop Billy, whose nervous face stared up at her nervously, waiting to see if she believed it all. Her fit, nude body glimmered in the dim light as she mounted her big brother and thought about all that he had said, before making her decision.