She never meant to post that first picture. Just a quick snap of her bare tits in the bathroom mirror after a shower, nipples hard from the cold tile, captioned “bored and horny, who wants to see more?” Tumblr ate it up. Within an hour the notes were climbing and her inbox was full of messages calling her a cum slut. She laughed, heart racing, and posted the next one: legs spread on the bed, fingers pulling her pussy lips open so the camera could see how wet she already was.
Her older brother found the blog by accident. He was scrolling late one night, cock in hand, when the username stopped him cold. It was her. The same freckles on her shoulder, the same messy ponytail. He should have closed the tab. Instead he kept scrolling, reading every filthy caption she wrote about wanting a thick load dumped deep in her cunt, about how she loved being called a cum slut while someone pounded her from behind.
The next morning at breakfast she was scrolling on her phone, cheeks pink. He leaned over and whispered, “I saw your Tumblr.” She froze, fork halfway to her mouth. He didn’t sound angry. He sounded hungry.
That night he came into her room after their parents went to bed. No talking at first. He just pushed her onto the bed, yanked her shorts down, and buried his face between her thighs. His tongue dragged through her slit like he was starving. She grabbed his hair and ground against his mouth, whispering the dirtiest things she’d ever said out loud.
“Fuck, eat that cum slut pussy,” she moaned. “Tongue-fuck me like you own it.”
He did. He licked and sucked until she came hard, thighs shaking around his head. Then he flipped her onto her stomach, pulled her hips up, and slammed his cock straight into her soaked hole. No condom. No hesitation. Just raw, deep strokes that made the bed creak.
“Tell me what you are,” he growled, pounding her.
“I’m a cum slut,” she gasped.
“Your cum slut. Fill this pussy up.”
He fucked her like he’d been waiting years. Every thrust slapped skin on skin, her juices running down his balls. When he was close he pulled out, flipped her again, and shoved back in so he could watch her face while he unloaded. Thick ropes of cum pumped into her, overflowing around his cock, dripping out in messy strings every time he thrust through the aftershocks.
They didn’t stop there. Every night after that he used her. Sometimes slow and deep, sometimes rough and fast, always raw. She kept posting on Tumblr, but now the pictures showed fresh creampies leaking from her swollen pussy, fingers scooping up his cum and pushing it back inside. The comments went wild. She never told anyone it was her brother’s load.
One weekend their parents were out of town. He tied her wrists to the headboard with her own panties and spent the whole day breeding her. He’d fuck her until he came, leave her dripping, then come back an hour later and do it again. By Sunday night her pussy was puffy and sore, constantly leaking, and she was begging for more.
“Such a greedy cum slut,” he said, slapping her clit lightly while he pushed another load into her. “This hole was made for my cum.”
She came again just from the words, walls fluttering around his cock, milking every drop.
After that they stopped pretending it was just sex. He started calling her his personal cum dump in private. She started wearing short skirts around the house with no panties so he could bend her over the kitchen counter whenever he wanted. Sometimes she’d post a new picture right after he filled her, captioning it “just got bred again, who wants to see the mess?”
The comments always exploded. She never showed his face, but the way she moaned his name when he fucked her was enough. They both knew this was their secret, their filthy little Tumblr fantasy come true, and neither of them planned on stopping.
Every time he emptied his balls inside her, she felt claimed. Every time she spread her legs and showed him how much cum was still inside, he got hard again. It was messy, it was wrong, and it was exactly what they both needed. She was his cum slut, and that pussy belonged to him.
