I slammed the laptop shut the second I heard the front door, but it was too late. My sister Emma stood in the doorway of my bedroom, eyes locked on the screen that had just gone black. At twenty-two she was all long legs and tight tank tops, and right now her face was pure "caught you."
"What the fuck were you watching, Jake?" she asked, voice low and curious instead of pissed. She was eighteen when she moved back in after college, and ever since then the house had felt like it was holding its breath around us.
"Nothing," I said, but she crossed the room fast, flipped the laptop open, and hit play. The video filled the screen: a brother and sister on a couch, the girl on her knees with her brother's cock buried in her throat while she looked up at him like she wanted to swallow him whole.
Emma didn't laugh. She didn't leave. She just watched for a long minute, then turned to me with a smirk that made my dick twitch.
"You into that shit?" she asked. "Incest oral sex stories porn. Real nasty."
I swallowed. "It's just porn."
"Bullshit." She dropped to her knees right there between my legs, hands already tugging at my shorts. "You want the real thing? Say it."
My cock was already hard when she pulled it out. She didn't tease. She wrapped her lips around the head and sank down in one wet slide, taking me straight to the back of her throat. The sound was filthy—gagging, slurping, spit running down my shaft while she worked her tongue along the underside.
"Fuck, Emma," I groaned, hands in her hair. She pulled off just long enough to grin up at me.
"Call me your dirty little sister while I suck you."
She went back down harder, bobbing fast, cheeks hollowing, throat squeezing every time she forced me deeper. Spit coated my balls. She gagged on purpose, eyes watering, but she didn't stop. Her hand pumped the base while her mouth worked the rest, loud and wet and nasty.
I lasted maybe three minutes before I warned her. She just moaned around my cock and took the first spurt straight down her throat, then pulled back so the rest painted her tongue. She showed me the load before she swallowed, then licked me clean like it was her favorite treat.
That was the start.
After that, it became our thing. Every time our parents left the house, Emma would find me. Sometimes she'd crawl under the kitchen table while I ate breakfast, unzip me, and suck me slow and deep until I fed her. Other times she'd drag me to the couch, strip naked, and spend twenty minutes just worshipping my cock with her mouth—long licks from balls to tip, sloppy kisses, then sudden deep-throat plunges that made her eyes roll back.
She loved the dirty talk. "Tell me how your sister's throat feels better than any pussy," she'd demand between sucks. "Tell me you want to fuck my face like I'm your personal incest oral sex stories porn slut."
I gave her what she wanted. I'd hold her head and thrust up into her mouth, using her throat while she moaned and drooled all over herself. She'd finger her own pussy while she blew me, coming hard with my cock buried in her mouth.
One afternoon she came home from the gym in tiny shorts and a sports bra, sweat still glistening on her skin. She didn't say a word. She just shoved me onto the bed, yanked my pants down, and went to work. This time she focused on my balls—sucking them one at a time into her hot mouth, rolling them with her tongue, then licking lower to tease my ass while her hand stroked me. When she finally took my cock again she went all the way down until her nose pressed against my stomach, holding there until she had to breathe.
I came so hard my vision blurred. She kept sucking through it, milking every drop, then climbed up and kissed me with my own cum still on her tongue.
We never fucked. That was the rule she set. Just her mouth. Just the filthiest, sloppiest, most addictive head either of us had ever had. She'd wake me up with it some mornings, sliding under the covers before my alarm went off.
She'd text me from the next room: "Come feed your sister." And I'd go, every single time.
By the end of the summer we were both addicted. She'd suck me twice a day, sometimes more, always raw and direct and hungry. And every time she swallowed, she'd look up with that same filthy little smile and say, "Best incest oral sex stories porn we've got going, right?"
I never argued.
