Stiles woke up with a delicious ache between her thighs. Last night’s hookup — some hot older guy she’d met at the club — had fucked her stupid. She stretched like a cat in her big bed, the sheets still smelling like sex and cologne. Her massive tits spilled out of the tiny tank top she’d slept in, pink nipples stiff from the morning chill. She rolled over, grabbed her phone, and smirked at the string of thirsty texts from three different guys.

“Morning, slut,” she whispered to herself, voice still raspy from moaning all night. She loved this life. Twenty-three, gorgeous, and completely unapologetic about how much she loved cock. Big ones, thick ones, ones that stretched her little pussy until she cried. She loved the way men looked at her when she wore slutty clothes — the hungry stares, the way they adjusted themselves when she bent over. She loved flirting shamelessly, loved letting them grope her ass in public, loved dropping to her knees in bathrooms or backseats and sucking cock like it was her favorite hobby.

But around Mom? Sweet little angel Stiles. The perfect daughter.

She rolled out of bed and padded to her closet, already deciding today’s slut outfit. Something that would make every man on the street stare. She picked a tiny white crop top that was basically a bra — thin enough that her dark nipples showed through if the light hit right — and a pair of denim micro shorts so short her ass cheeks hung out the bottom. No panties. She loved the feeling of cool air on her bare pussy. A pair of strappy heels and she was ready.

Stiles spent the morning doing exactly what she loved: being a filthy little tease. She went to the café near campus, ordered an iced coffee, and spent twenty minutes “accidentally” dropping things so she could bend over in front of the cute barista. By the time she left, he’d slipped her his number and she’d already decided she’d let him fuck her in the supply room next week. On the way home she stopped at the mall, tried on tiny dresses in the changing room, took mirror selfies with her tits pushed together, and sent them to two of her regular fuck buddies with the caption “come ruin me later 💕”.

By afternoon she was horny again. She ended up in the backseat of some finance bro’s car in the parking garage, skirt hiked up, moaning while he pounded her from behind. “Fuck, you’re such a tight little slut,” he groaned, slapping her fat ass. Stiles just giggled and pushed back harder, loving every filthy word. She came twice before he filled her pussy with cum. She didn’t even clean up properly — just pulled her shorts back on, feeling his load leak down her thigh the whole drive home. That was the thrill. Being a secret whore while looking like a sweet college girl.

When she got home, she heard her mom’s voice and instantly switched. The slutty smirk disappeared. She fixed her hair, pulled her top down a little to look more modest (even though it was still slutty), and walked in with a bright, innocent smile.

“Mooom~ I’m home!” she called in her sweetest voice.

Lydia turned from the kitchen island, looking stunning as always. Forty-five but she could pass for twenty-five easy — same white skin, same pink lips, same killer body. Today she was in a tight red dress that hugged her big tits and showed off her long legs. Lydia had always been a bit of a slut too, but lately she was glowing because of Scott.

“Baby girl,” Lydia smiled, pulling her into a hug. “You look so cute today. Did you have fun?”

Stiles batted her lashes, the picture of innocence. “Just studied a little and went shopping. Nothing exciting.” Inside she was still feeling that guy’s cum slowly dripping out of her freshly fucked pussy, but her voice stayed soft and sweet.

Lydia’s eyes sparkled. “Good. Because tonight is important. Scott wants us to have dinner at his mansion so you can finally meet his son Derek. He’s your age — twenty-three. Isn’t that perfect? We’re getting serious, baby. He wants to marry me… but first he wants our kids to meet and get along.”

Stiles’s heart did a little flip. Marry? Move in? She kept her sweet expression. “That sounds nice, Mom. I’m happy for you.”

Inside, the slut in her was already wondering what Scott’s son looked like. If he was hot, maybe this dinner wouldn’t be so boring after all.

Across the city, Derek was in a foul mood.

He was in the home gym at his dad’s mansion, shirtless, sweat dripping down his tattooed chest and abs as he finished another brutal set of bench presses. Twenty-three, tall as fuck, built like a god, covered in ink — he could have any girl he wanted. And he did. Regularly. But right now he was pissed.

His dad, Scott — fifty, rich, tall, handsome, the kind of man who still turned heads — had been dating some woman named Lydia for months. And now he wanted to marry her. Which meant Derek was about to get a fucking stepmom and a stepsister he didn’t ask for.

“Fuck this,” he muttered, dropping the barbell with a clang. He grabbed a towel, wiped his face, and headed upstairs to shower. His cock hung heavy between his legs even soft — thick, veiny, the kind that made girls stare. He wasn’t against his dad being happy, but the whole “blended family” shit? Nah. He liked his freedom. Liked bringing girls home and fucking them loud without worrying about some innocent little stepsister hearing.

He was still annoyed when he got the text from his dad:

Dinner tonight. 8pm. Wear something nice. Lydia and her daughter Stiles are coming. Be on your best behavior.

Derek rolled his eyes but texted back fine.

He spent the rest of the afternoon half-distracted, scrolling through his phone, ignoring flirty texts from two different girls he’d fucked last week. His mind kept drifting to the dinner. What if this Stiles chick was some annoying prissy type? Or worse — what if she was hot and he had to deal with blue balls around his new stepsister?

By 7:30 he was dressed — black button-up rolled at the sleeves showing off his forearm tattoos, dark jeans that hugged his muscular thighs and did nothing to hide the bulge if he got hard. He headed downstairs to the massive dining room, already set with fancy plates and candles. Scott was there, looking sharp in a suit, smiling like a man in love.

“Son,” Scott said warmly, clapping him on the shoulder. “Thanks for doing this. Lydia means everything to me. I really want you two to get along.”

Derek forced a small smile. “Yeah, Dad. Whatever makes you happy.”

The doorbell rang.

Scott’s face lit up. “They’re here.”

He opened the grand front doors and there they were.

Lydia first — gorgeous, glowing, wearing a tight emerald-green dress that showed off her killer body. She looked genuinely happy to see Scott and gave him a sweet kiss on the lips. “Hi, baby,” she said softly.

Then Stiles stepped in behind her.

Derek’s cock fucking twitched in his jeans the second he saw her.

She was… fuck. Stunning didn’t cover it. Same white skin as her mom, same full pink lips, but younger, fresher, with this innocent-yet-filthy aura that hit him like a truck. Long dark hair, big doe eyes that looked sweet but he could already see the slut underneath. Her body was insane — massive tits straining against the tight black dress she wore, deep cleavage on full display, the fabric hugging a tiny waist and then flaring out over the fattest, juiciest ass he’d seen in a long time. The dress was short, showing off long smooth legs. She looked like she was trying to dress “nice” for dinner but still managed to look like pure sex on legs.

His dad welcomed them warmly. “Lydia, Stiles — welcome. This is my son, Derek.”

Stiles’s eyes flicked up to him and Derek saw the exact moment her mask slipped for half a second. Pure lust. She was checking him out — his height, his muscles, the tattoos peeking out, the way his jeans sat low on his hips. Her pink lips parted slightly. Then the sweet-girl mask snapped back on.

“Hi, Derek,” she said in the softest, cutest voice, giving him a shy little smile and a small bow. “It’s really nice to meet you.”

Lydia was already being warm and motherly, complimenting the house and telling Scott how handsome he looked. Scott was eating it up, one hand on Lydia’s lower back, clearly in love.

They moved to the long dining table. Derek sat across from Stiles. Big mistake. From this angle he could see straight down her dress every time she leaned forward. Those massive tits looked so soft and heavy. He wondered what color her nipples were. Wondered how they’d feel in his mouth.

Dinner started polite. Scott served wine, asked Stiles about school, told stories about Derek when he was younger. Lydia was sweet to Derek, asking about his tattoos and gym routine, treating him like family already.

But Derek wasn’t fooled by Stiles for a second.

She was acting so fucking innocent — big eyes, soft voice, little giggles — but he saw right through it. The way she kept crossing and uncrossing her legs under the table, making that short dress ride higher. The way her nipples were hard and poking against the thin black fabric. The way she kept stealing glances at his arms, his chest, his mouth. And especially the way she was subtly grinding her pussy against the chair.

Every few minutes she’d shift, pressing her clit down onto the seat, a tiny little roll of her hips that no one else seemed to notice. But Derek noticed. He watched her bite her lip when she did it, eyes fluttering for a split second before she went back to sweet mode.

Then she did it.

She looked at Scott with those big innocent eyes and said in the sweetest voice, “This is so delicious, Daddy~ Thank you for inviting us.”

Derek’s cock went from half-hard to rock fucking solid in seconds.

She called his dad Daddy. While subtly humping her chair like a needy little slut. And she said it so sweetly, like butter wouldn’t melt in her mouth. Scott just smiled warmly, completely charmed. “You’re very welcome, sweetheart.”

Lydia beamed. “Isn’t she the cutest?”

Derek almost laughed. Cute? This girl was a filthy little actress. He could see it in her eyes — the second she thought no one was looking, that innocent mask cracked and pure slut peeked through. She wanted cock. Bad. And from the way she kept glancing at the thick bulge in his jeans under the table, she wanted his cock.

Under the table, Stiles’s foot brushed against his leg “accidentally.” She didn’t pull away. Instead she let it rest there, toes slowly tracing up his calf. Derek’s jaw tightened. He reached down and caught her ankle under the table, squeezing once — a warning. Or maybe a promise. Her eyes flicked to his and for one hot second the innocent act dropped completely. She looked at him like she wanted him to bend her over the table and fuck her stupid right in front of everyone.

His cock throbbed painfully.

Dinner dragged on with polite conversation, but the sexual tension was thick enough to choke on. Lydia and Scott were in their own little loved-up world, laughing softly, touching each other. Derek kept stealing looks at Stiles’s cleavage, imagining ripping that dress down and sucking on those fat tits while she moaned “Daddy” for real — but for him.

Stiles, meanwhile, was in heaven and hell at the same time. Derek was exactly her type — tall, muscular, tattooed, dangerous-looking. The kind of guy who would choke her and call her a dirty slut while pounding her pussy raw. She was already soaked. Every time she called Scott “Daddy” in that sweet voice she felt her clit throb. She kept grinding subtly, imagining it was Derek’s thick cock she was rubbing on instead of the chair. She wanted to crawl under the table, pull his cock out, and suck it while everyone ate dessert.

She was already planning how she’d sneak around if they moved in. How she’d “accidentally” walk in on him showering. How she’d wear even sluttier clothes around the house. How she’d let him fuck her in every room while their parents were out.

Scott cleared his throat near the end of the meal, looking at Lydia with pure love. “Lydia… before we talk about the wedding, I have something I want to ask. I’d really like you and Stiles to move in here with us. Get to know each other properly as a family before we make it official. What do you think?”

Lydia’s eyes filled with happy tears. “Oh, Scott… really? That would be wonderful. Stiles, baby, what do you think?”

Stiles put on her sweetest smile, heart racing with filthy excitement. “I think it’s a great idea, Mom. I’d love to get to know Derek better.” She glanced at him under her lashes, and the look she gave him said everything her sweet voice didn’t: I want to ride your cock until I can’t walk.

Derek’s cock twitched again. He was fucked. This fake-innocent, cock-hungry little slut was about to become his stepsister. And from the way his body was reacting, he was already imagining all the nasty shit he wanted to do to her.

Scott looked relieved and happy. Lydia was glowing.

Stiles just kept smiling sweetly… while her pussy throbbed and leaked at the thought of living under the same roof as Derek and finally getting that big tattooed cock she was already obsessed with.