I slammed my cock through the hole in the wall the second I heard the wet mouth on the other side. No hesitation, no bullshit. Just raw need. The gloryhole at this seedy truck-stop bathroom was famous for quick, filthy releases, and tonight I needed it bad. My balls ached from a week without pussy, and when that warm tongue dragged up my shaft I grunted loud enough for the whole place to hear.
"Fuck yeah, suck it," I growled, pushing my hips forward until my pubes pressed the plywood. The mouth took me deep, sloppy and eager, lips stretched tight around my thick dick. Spit ran down my balls while she bobbed hard and fast. No teasing, just straight-up throat fucking. I could hear her gagging softly on the other side, and it made me throb even harder.
Then the voice hit me. Low, familiar, moaning around my cock like she was starving for it. "Mmm, give me that load, baby brother."
My whole body locked up. That was my sister Lisa's voice. Twenty-three, same as me, living two doors down in the family house. The same sister I grew up with, the one whose laundry I sometimes folded, the one whose room was right next to mine. And here she was, on her knees in a dirty gloryhole stall, sucking my dick like it was her favorite meal.
I should have pulled out. Should have zipped up and run. Instead I slammed deeper, forcing my cock into her throat. "You dirty fucking slut," I hissed through the wall. "You know exactly whose cock that is, don't you?"
She didn't pull away. Her tongue swirled under my head and she moaned louder, the vibration shooting straight up my spine. "Knew it the second you stepped in," she whispered between sucks. "Been hoping it was you. Been dreaming about tasting my brother's cum through this hole."
That broke something in me. I started thrusting, using the hole like a fuck toy, pounding her mouth while she gagged and slurped. The wet sounds were obscene, echoing off the tile. Every time my balls slapped the wall she whimpered and sucked harder. I could picture her on the other side, knees spread on the filthy floor, probably fingering her own cunt while she swallowed her brother's dick.
"Take it all," I snarled. "Swallow every drop like the incest whore you are."
She did. The second I blew, thick ropes pumping straight down her throat, she gulped and moaned like she was coming too. I kept feeding her until my legs shook, until the last spurt left me dripping and sensitive. Only then did she ease off, licking me clean with slow, filthy strokes of her tongue.
I stayed hard. The taboo rush was too strong. "Get your ass up," I ordered. "Turn around. I want that pussy next."
Fabric rustled. A second later her wet slit pressed against the hole, lips puffy and dripping. I lined up and shoved in, no mercy. She was tight, hot, and so fucking wet it squelched when I bottomed out. Her ass cheeks flattened against the plywood as I railed her through the gloryhole, each thrust making the wall creak.
"Fuck me, little brother," she panted from the other side. "Use that hole. Fill your sister's cunt."
I gripped the top of the partition and hammered her, balls swinging, the wet slap of skin on skin loud and nasty. Every stroke dragged across her clit because she kept grinding back. She came first, cunt clamping down so hard I almost lost it, her juices running down my shaft and dripping on the floor. I didn't stop. I fucked her through it, then pulled out and slammed back into her ass when she begged for it.
By the time I unloaded inside her, my cum was leaking out around my cock and she was shaking, calling my name in that hoarse, fucked-out voice. We stayed locked together for a long minute, breathing hard, my dick still twitching inside her.
When I finally pulled free she whispered, "Same time tomorrow?"
I zipped up, heart still pounding from the filthiest, hottest fuck of my life. "Count on it, sis. And next time I'm bringing a friend."
Her soft laugh drifted through the hole. "Make it two. I want both holes filled at once."
I walked out of that bathroom already hard again, knowing the next chapter of our filthy family secret was only a day away.
