Two smut book authors sat across from each other in a cheap hotel room, laptops open on the table between them. Marcus wrote under a female pen name and cranked out quick, nasty stories about rough hookups. Lena pumped out male POV filth about wives getting wrecked by strangers. They had decided to co-author a new book after trading emails full of explicit scene ideas. No bullshit, no romance, just straight dirty collaboration.
Lena leaned back in her chair and spread her legs a little under the table. "I want the first chapter to open with the guy walking in and telling her to get on her knees right away. No small talk."
Marcus nodded and typed a few lines. "Yeah.

He says, 'Suck my cock like you mean it.' She pulls his pants down and starts licking the head."
Lena's hand drifted between her thighs. She rubbed her clit through her jeans while she read what he wrote. "Make it wetter. She spits on it, gets it sloppy. I like when the spit runs down his balls."
They kept going like that for an hour, building the scene word by word. Marcus adjusted his dick in his pants every time Lena described a new detail. Lena's nipples showed through her thin top. Eventually Marcus stood up, walked around the table, and grabbed her by the hair.
"Let's act this shit out so we get the details right," he said.
Lena looked up at him and unzipped his jeans without another word. She pulled his cock out, already half hard, and wrapped her hand around the shaft. "Thick. Good. The character in the book has a fat one like this." She leaned in and licked from the base to the tip, then spat on it and started stroking.
Marcus groaned. "Fuck, just like that. Now take it deeper."
She opened her mouth and slid his cock in until her lips touched her fingers. She bobbed her head fast, making wet sucking sounds. Marcus held her head with both hands and started thrusting into her throat. Saliva dripped down her chin onto her shirt.
"Chapter two needs her bent over the desk," Lena said when she pulled off to breathe. Spit connected her lips to his cock. "He yanks her panties down and slams in."
Marcus pulled her up, spun her around, and bent her over the table. He yanked her jeans and underwear down to her knees in one move. Her pussy was already wet. He lined up and shoved his cock inside her with one hard thrust.
Lena gasped. "Harder. Make it rough like we wrote."
He fucked her fast and deep, hips slapping against her ass. The table shook under them. Marcus reached around and rubbed her clit in rough circles. "Your cunt's gripping me tight. Just like the wife in our story who cheats with the delivery guy."
Lena pushed back against him. "Yeah. Tell me I'm a dirty slut while you do it."
"You're a filthy fucking slut who writes books about getting pounded and then bends over for real," Marcus growled. He slapped her ass hard enough to leave a red handprint. Lena moaned louder.
They switched positions after a few minutes. Lena climbed on top and rode him on the hotel bed. She grabbed the headboard and bounced on his cock, tits swinging. Marcus reached up and pinched her nipples. "Squeeze that pussy. Milk my dick."
She did, clenching around him. Sweat ran down her back. "I'm gonna come like this. Don't stop."
Marcus thrust up to meet her. When she came she clenched hard, pussy pulsing around his shaft. He flipped her onto her back and kept pounding until he pulled out and shot thick ropes of cum across her stomach and tits.
They lay there catching their breath for a minute, then went back to the laptops. Lena typed with one hand while Marcus's cum cooled on her skin. They added the new details to the manuscript, making the sex scenes even filthier based on what they had just done.
By midnight they had written another chapter and fucked twice more. Once against the wall with Lena's legs wrapped around him, once with her on all fours while Marcus pulled her hair and called her every dirty name they had used in their books. They ordered room service, ate naked, then started the next scene with Lena riding Marcus's face while she dictated the dialogue out loud.
The book they finished that weekend sold better than either of their solo work. Readers left reviews saying the sex felt real. Marcus and Lena kept meeting up every couple of months to "research" new chapters. Each time the fucking got dirtier because they knew exactly how to write what they wanted to do next. No feelings, just raw material for the next smut book.