Yes, but with a price.

Billy started to come back to his senses. His brain was still scrambled from Anna's knockout punches, and now he was oxygen-deprived on top of it from her humiliating smother. Was this really happening? Had his sister really just knocked him out fair and square, stripped her sweaty clothes off, and taken a victory lap on his face?

"Please what?" Anna asked expectantly. Had he said something? She seemed to think he was begging for some reason.

"I don't--I don't know" he stammered, still having trouble forming words.

Anna rolled her eyes theatrically. "Yes, you do, you goofball! It's what you asked for right before our match! But I want to hear you ask for it again," she said mischievously.

Before the match? Billy couldn't remember anything from just before the match. One moment, he was watching her sew up the gloves, and the next he was flat on his back, straddled by Anna's naked body, her glistening pussy just inches from his face.

Now Anna leaned down, getting her pretty face close to his. "Look, do you want a blow job? Or not?" she asked.

Billy was taken aback, but he instantly remembered. That was still on the table? Billy's cock was rock hard even now, and therefore it was his cock that decided the answer, not his brain.

"Yes, yes, please, Anna, a blow job, that would be so amazing," Billy blurted out, completely at the mercy of his own lust. Not that his brain would have thought of a different answer, had it been able to catch up.

Anna swung a leg over Billy's body, brushing her foot against his face and rubbing her wet pussy on his chest. She spun around so she was straddling him facing his feet, then went to her hands and knees, giving him a great view of her ass, with her pussy peeking through the tiny triangular gap between her thighs. She slid Billy's shorts down a few inches, and his cock sprang out of them completely hard. She made a small noise of approval and grabbed it with her hand.

"Ooooh," sighed Billy. He couldn't see exactly what she was doing; he could mostly only see her ass, pussy, and the backs of her thighs. His arms were trapped awkwardly under her calves.

He saw her head dip down and immediately felt a warm wetness enveloping his dick from top to bottom. His head jerked up and forward involuntarily from the intensity of the feeling, and ended up bouncing off Anna's firm ass. He was able to lower his head to the floor as he felt Anna's lips sliding up his cock to the head, where they lingered and tightened a little. Then his dick popped out of her mouth with a sound like a quiet cork.

"You like that?" she asked in a sultry whisper.

"Yeaahhhh," Billy moaned, unable to really say more.

"Well, if you want me to keep going, you need to kiss my ass," Anna said, ratcheting up her newfound domme personality another notch.

Without even thinking about it, Billy leaned up in a half-crunch and planted a sincere but quick kiss on Anna's left cheek.

In return, she leaned back down and swirled her tongue once around the head of Billy's cock. It felt so good it made Billy's bruised abs tense and spasm, but it was over almost before it began. After a pause, Anna straightened up and looked over her shoulder at him.

Billy understood. He would have to keep worshiping her ass for her to continue the blow job. The realization must have been obvious on his face, because Anna smiled at him. "You do get it...you keep kissing, I keep kissing," she said to him.