It wasn't an unusual sight for Pete. He scoffed and walked over, immediately pinching one of Linda's nipples where it was visibly stiff under the thin fabric of her shirt. "Were you trying to rub yourself again? I'm starting to think you're kinda stupid, Linda. How hard is it to just follow the rules?"
Linda whined and squirmed, pleasure and pain radiating out from where her brother had a firm grip on her sensitive nub. She was too stunned--and too embarrassed by the presence of the third man in the room--to formulate a defense against her brother's insults.
Speaking of the third man: Steve had stopped in the door and was just...staring, his eyes crawling slowly from Linda's flushed, tearful face down to her exposed thighs and wet pussy.
He looked to be around the same age as Pete--twenty, a couple of years younger than Linda--but he had a more mature air to him, without the frantic excitement that Pete tended to show whenever he was invited to participate in Linda's punishments.
"Want to help? Dad, can Steve help?" Pete asked. He turned towards Daddy as he asked, and finally let go of Linda in the process. Linda moaned in mingled relief and distress as blood flowed back into the abused nipple. Her spine quivered, and she tried to resist the urge to roll her hips and grind down into the mattress again, her arousal burning bright once more as the pain faded.
Steve drifted into the room slowly, his gaze still fixed on Linda. "What am I helping with?"
"We're trying to make her come. Right, Dad?" Pete clarified, then looked over to Steve when Daddy nodded. "She's not allowed without permission--to teach her not to be a whore like Mom was. You can touch her however you want to try and get her off, but go slow, so that Dad has a chance to punish her when it happens. It's okay if he helps, right, Dad?"
"Of course," Daddy agreed, even as Linda whined and shook her head. She did not want Steve helping! "I've got condoms here if either of you want to fuck her slut cunt."
"Ooh, can I make her ride me?" Pete asked, already climbing onto the bed. "Jeez, she looks so wet already. That's nasty."
Linda squirmed again, this time in embarrassment. She turned her knees inward to press her thighs together and hide the sticky spot she'd left on the sheets.
"It's not my fault," she tried to protest. "Daddy put his fingers in me, and--"
"Quiet, whore," Daddy instructed. "I know I already told you to stop whining--and keep those legs spread, stop pretending you're shy. Here you go, Pete, put that on before you let her climb on you."
Pete exclaimed with excitement as he grabbed the wrapped condom from Daddy.
Linda shivered and chewed at her bottom lip. She felt so empty, and the idea of having a cock in her sounded so good--but it was embarrassing enough to get fucked with her brother and her dad in the room. Now there was this stranger watching...and they weren't even going to let her come properly anyway--!
But there was no point in protesting. She didn't get any say in what happened, and she knew it was a bad idea to test Daddy's patience any further.
Pete got his jeans off pretty fast. He didn't bother to lose his boxers, just pulling the waistband down enough to expose his hard cock and roll on the condom.
Then he had to get into position, and that turned out to be kind of tricky, with Linda cuffed to the headboard.
"Pete!" Linda protested, then yelped as he shoved her in a way that wrenched at one of her arms. "Ow! Stop it!"
"Lift your hips up, you stupid bitch!" Pete demanded. "I'm trying to get under you so you can sit on my cock!"
It took another moment of awkward scrambling, but finally they managed it: Pete sitting with his back to the headboard, and Linda in his lap, her spine forced into a dramatic arch from where her wrists were still attached to the headboard behind them.
"This is uncomfortable, Pe--ohh..." Linda groaned and her eyelids fluttered as she felt the hot, blunt end of Pete's cock prodding at her slit, teasing right up against her achingly sensitive pussy. "Mm, I...Daddy, please, I don't want a ruin...!"
"No? Seems like you should've thought about that before you broke your rules," Daddy said, patting her hip a bit too sharply. "Go ahead and get in her, son, let's make this quick."
Linda's next protest turned into a loud whine as Pete used an arm wrapped around her waist to maneuver her, dragging her down onto his cock in one smooth, quick motion.
The arousal that had cooled just a bit inside her flared immediately to critically urgent once more. Linda squeezed her eyes shut and fought to stay still as her pussy throbbed and burned, stretched tight around the sudden intrusion of her brother's cock.
"Fuck yeah," Pete groaned, and then reached up to pinch firmly at her nipple again, the same one that was still aching from his attentions earlier. "Tighten up a bit, Linda, you're so sloppy--yeah, like that."