Britney Spears slammed the door behind her, sweat still glistening on her skin from the stage lights. The mansion was quiet except for the low growl coming from the corner of the living room. Her brother sat on the couch, pants already open, cock hard in his fist. The family dog, a big muscular mastiff, paced nearby, its red cock already starting to peek out.
"Lock the door," her brother said, voice rough. "I want that tight pussy first, then you're taking the dog."
Britney stripped fast, dropping her dress to the floor. She climbed onto her brother's lap and sank down on his cock in one wet slide. "Fuck, yes," she hissed, riding him hard. Her tits bounced as she ground down, taking every inch. "Fill me up so the dog can smell it."
He grabbed her ass and thrust up, pounding her cunt with short, dirty strokes. "You're such a filthy slut for family cock. Say it."
"I'm a filthy slut for my brother's cock," Britney moaned, clenching around him. She came quick and loud, pussy spasming, juices running down his balls.
He pulled out and shoved her onto all fours on the rug. "Now the dog. Present that used cunt."
Britney stayed on her hands and knees, ass high, legs spread. The mastiff sniffed between her thighs, tongue lapping at the cum leaking from her pussy. The long, rough tongue dragged over her clit and hole, making her moan and push back. The dog mounted her fast, front paws gripping her waist, and drove its hot, pointed cock straight into her slick cunt.
"Oh fuck, it's so hot," Britney gasped as the dog started hammering. The rapid, animal thrusts stretched her, knot already swelling at the base. Her brother knelt in front of her and fed his cock into her mouth. She sucked him sloppy while the dog fucked her from behind, the wet sounds filling the room.
The knot popped in and locked. The dog kept thrusting in short jerks, pumping load after load of thick cum deep into her. Britney came again, shaking, mouth full of her brother's cock. He pulled out and stroked fast, shooting ropes across her face and tits.
When the knot finally slipped free, cum poured out of her in a hot flood. Britney stayed on all fours, panting, while her brother slid back under her and pushed his still-hard cock into her cum-slick ass.
"Round two," he growled.
"Dog's ready again."
The mastiff circled, already hard once more. Britney opened her mouth and took the dog's cock between her lips while her brother fucked her ass. She sucked the slick, tapered length, tasting her own juices mixed with canine cum, while her brother pounded her from behind.
They kept going until she was dripping from every hole, face streaked, thighs shiny. Britney collapsed on the rug, smiling, used and satisfied, the dog licking lazily at her swollen cunt while her brother stroked her hair.
"Same time tomorrow," she whispered.
