Sister Catches Mom Riding Brother’s Huge Cock — Then Joins the Incest Threesome

Sister Catches Mom Riding Brother’s Huge Cock — Then Joins the Incest Threesome

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The house still smelled like coffee and eggs when I opened the door.

I was twenty, two weeks into second year, and I’d taken the early train home because my roommate’s boyfriend had slept in our dorm and I didn’t want to watch them fuck through a cheap curtain. Curious had always been my problem. Curious got me in trouble. Curious was why I didn’t text anyone I was coming.

Mom was in the kitchen in a robe that didn’t close. Massive breasts. That was the phrase boys at college used when they thought I couldn’t hear them talking about her from the photos on my desk. They weren’t wrong. The robe gave up at the chest. She was plating scrambled eggs like it was any Sunday.

“Ellie,” she said, startled, then smiling too fast. “Baby. You didn’t say—”

“Surprise.” I dropped my bag. “Is there coffee?”

There was. There were also two mugs already out. Two plates. Embarrassment flicked across her face so quick I almost missed it.

“Your brother’s home too,” she said. “Ryan took a long weekend. He’s… upstairs. Shower.”

Ryan was twenty, same as me, a year behind because he’d deferred. Huge cock was another phrase I’d heard, once, from a girl on his hall who didn’t know I was his sister. I’d laughed it off and then thought about it longer than I should have. Incest was a joke until you lived in a house with thin walls.

I sat. I ate eggs. I drank coffee that was slightly burnt. Mom kept glancing at the ceiling.

That was the first lie of the morning.

The second was the shower that wasn’t running.

I went up to dump my bag and the master bedroom door was open a crack. I should have kept walking. Curious again.

Mom wasn’t in the kitchen anymore. I hadn’t heard her pass me.

I pushed the door.

Ryan was on his back on her bed, naked, and Mom was on him — robe gone, massive breasts hanging over his face, her hips working in a slow grind. His hands were on her ass. Her mouth was open. The wet sound was obscene in the quiet house.

Caught.

Not a girlfriend. Not a porn tab. Mom fucking brother.

“Jesus Christ,” I said.

They froze. Ryan’s eyes went wide. Mom didn’t climb off right away. That was the part that burned in. She stayed seated on his cock for one more second, like leaving would make it more real.

Then she did. His cock slapped wet against his stomach. Huge. The girl on his hall hadn’t been exaggerating. Thick, flushed, shining with my mother.

Embarrassment hit all three of us at once. Nobody grabbed a sheet fast enough.

“Ellie—” Mom started.

“You’re cheating,” I said, and I didn’t even know who I meant it at. Dad on a work trip. Ryan’s on-and-off girlfriend back on campus. The whole idea of a family that ate eggs together. “You’re actually—”

“It’s not—” Ryan sat up. His voice cracked. “El, don’t—”

“Don’t what? Don’t look? I live here.”

Mom pulled the robe around herself and it did nothing. Massive breasts still strained the silk. She looked at me the way she used to when I’d caught her smoking on the porch at sixteen, except I wasn’t sixteen and this wasn’t a cigarette.

“You’re home early,” she said, uselessly.

“Yeah.” My mouth was dry. “Coffee’s still hot. Eggs are getting cold. And you’re fucking my brother.”

Silence. A car went by outside. Ryan’s cock was still hard. He didn’t seem to know where to put his hands.

Curious was an ugly word when it was honest.

I should have left. I put my palm on the doorframe instead.

“How long?”

Mom swallowed. “Since spring. He came home after midterms. I was lonely. That’s not an excuse.”

“It’s a little bit of an excuse,” Ryan muttered, then shut up when I looked at him.

“Does Dad know?”

“No.”

Caught cheating. There it was. The whole house built on coffee and eggs and a secret in the master bed.

I laughed once, sharp. “You’re a whore,” I said to her, and then to him, “and you’re worse.” I didn’t walk out. “I kept thinking about that girl on your floor. The one who said you were packing. I thought she was disgusting. Now I get it.”

“Ellie,” Mom said quietly. “If you’re going to hate us, hate us downstairs. Don’t stand there and stare.”

“I’m staring because I’m curious.” The word came out ugly and true. “That’s my problem. Always has been. I came home because my roommate was getting railed and I couldn’t stop listening. And now this.”

Ryan looked at Mom. Mom looked at me.

“You’re twenty,” she said. “You’re allowed to leave.”

“I know.”

I stepped into the room and shut the door. The click was louder than it should have been.

Nobody told me to open it again.

Mom’s robe loosened like she’d given up pretending. Ryan didn’t cover himself. I pulled my campus hoodie off. T-shirt underneath. I wasn’t built like her — not massive breasts, not even close — but my nipples were already hard and I hated that they were.

“If I stay,” I said, “it’s not because I forgive you.”

“Then why?” Ryan asked.

“Because I want to know what the hell is wrong with this family. And because I’m already wet and I’m not honest enough to lie about it.”

Mom made a sound that wasn’t quite a laugh. “Come here.”

I did.

She kissed me first. That was the line I hadn’t expected to cross. Coffee on her mouth. Her hand on the back of my neck. Ryan watched his mother kiss his sister and his cock twitched against his thigh. Embarrassment didn’t leave. It just sat in the room with us and got hotter.

Mom pulled my shirt off. She looked at my chest without comparing, which was a kindness I didn’t ask for. Ryan reached for my jeans. I let him. Underwear hooked down. I was soaked. He swore under his breath.

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“Sister,” he said, like he needed the word said out loud so it would be real.

“Don’t make it sweet.”

Mom guided me onto the bed. She lay back and pulled me over her face like she’d done this in her head already. Muschi-Lecken wasn’t the word we used in this house, but that’s what it was — her mouth on me, unhurried, while Ryan knelt behind and watched. I grabbed the headboard. Mom’s massive breasts shifted when she breathed. I reached down and held one because I could, because the taboo was already broken and touching her felt like joining a crime.

She licked me until my thighs shook. Then she turned her face to Ryan.

“Her first. You already had me.”

He hesitated. Huge cock in his fist, wet from Mom. “El. You sure?”

“If you ask again I’m leaving.”

He pushed into me slow. Stretch first, burn second, then the kind of full that made my mouth fall open. Mom watched from below, two fingers on my clit, and said, “That’s it. Take your brother’s cock. That’s what you came home for and didn’t know it.”

Whore was a word that fit more than one person in the bed.

He fucked me in long strokes. The headboard tapped the wall. I came embarrassingly fast, clenching, swearing, Mom’s name and his name mixed up. He didn’t come. Mom pulled him out of me and took him in her mouth, tasting me on him, and the sound I made was awful.

Threesome wasn’t a plan. It was just what the bed became.

I sat on his face because Mom told me to and because I wanted to shut him up. He ate me like he was sorry and hungry at the same time. Mom straddled his hips and took that huge cock back inside her, massive breasts bouncing, robe nowhere. I leaned forward and sucked on her nipple while she rode my brother. She held my hair. She called me baby. She called him baby. The words stacked until they were filthy.

“Caught you,” I whispered against her skin. “Caught you cheating. Now I’m in it.”

“Then stop talking and kiss me.”

We did. Ryan’s tongue on me, his cock in her, our mouths together. I came again on his face. Mom came with a broken sound and collapsed forward into me. He still hadn’t finished.

“Where?” he asked, wrecked.

Mom looked at me.

“In her,” I said. “She started this.”

He flipped Mom onto her back and buried himself and came with his forehead on her collarbone, pulsing, groaning like it hurt. I watched it leak out of her when he pulled back. Embarrassment returned, late and useless.

We lay there. Coffee was cold downstairs. Eggs were worse.

“Dad gets back Tuesday,” Mom said to the ceiling.

“Then we don’t do this Tuesday,” I said.

Ryan laughed once, shaky. “That’s your line? Calendar math?”

“I’m curious, not stupid.”

Mom turned her head on the pillow and looked at both of us. Massive breasts still bare, nipple wet from my mouth. “You’re both staying the weekend.”

It wasn’t a question.

Downstairs I poured fresh coffee. I made more eggs because the old ones were sad. We sat at the same table as an hour ago. My brother wouldn’t meet my eyes and then he did. Mom’s robe was tied this time. My hoodie was back on. The house smelled like sex under the coffee.

“So,” I said. “Back to school tomorrow night. Unless someone has a better idea.”

Mom sipped. “Stay tonight. We’ll talk.”

Ryan’s knee touched mine under the table and didn’t move.

Curious had always been my problem.

Now it was the house’s problem too.

That night we didn’t talk first.

I found them in the shower. Steam. Her mouth on him. I stepped in and went to my knees on the tile and took my brother’s huge cock down after it had been in our mother’s throat. Whore, I thought, and I didn’t know if I meant her or me. She held my hair and told me to slower, then deeper. He came on my tongue because she said to. I swallowed and stood up shaking.

Bed again. Her eating me while he fucked her from behind. Then me on top of him, facing her, kissing my mother while I rode my brother. Threesome until the mattress was a wreck. He came in me the second time. Mom licked it out of me after, unhurried, like eggs in the morning — something you just did in this kitchen, this room, this family.

I slept between them.

In the morning there was coffee. There were eggs. There was embarrassment in daylight that didn’t undo anything.

Ryan walked me to the train Sunday with a mark on his neck he wouldn’t explain on campus.

“If you tell anyone,” I said.

“Who would believe it?”

Fair.

Mom texted when I sat down in the car: Next weekend. If you’re still curious.

I turned the phone face down.

I already knew I would be.

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