My Boyfriend’s Younger Brother Fucked Me While His Father Was Home – First Raw Cheating Sex

Read previous part: Flirting with My Boyfriend’s Younger Brother – We Started Secret Late Night Chat

The morning sunlight filtered through the curtains of the guest bedroom, but I was already wide awake. My body felt like it was on fire. Last night’s late chat with Karan had left me soaking wet and restless. I had fingered myself twice before finally falling asleep, yet my pussy was still throbbing, aching for something real. Something thick. Something that could actually satisfy me.
I reached for my phone on the bedside table. The screen lit up with new notifications. My heart skipped when I saw Karan’s name.
He had sent a message at 4:12 AM - after I had passed out.
The preview made my breath catch.
It was a picture.
I opened it with trembling fingers.
Karan: If you were wondering the size 😈
Below the text was a clear, close-up photo of his cock. Fully hard. Thick. Veiny. Long. The heavy shaft curved slightly upward, the swollen purple head glistening with precum. His hand was wrapped around the base for scale, and even then his fingers didn’t fully meet. It looked almost intimidating. Easily 8 inches, much thicker than Arjun’s. A perfect, young, angry cock that made my mouth water instantly.
I stared at it for a long time, biting my lip hard. My free hand slipped under the blanket and between my legs. I was drenched. My fingers slid easily over my swollen clit as I zoomed in on his dick pic.
“Fuck… Karan,” I whispered to myself.
That was the moment any remaining guilt disappeared. I didn’t just want him anymore. I needed him.
I typed back quickly.
Me: Oh my god… that’s fucking huge. No wonder you’re so confident 😩
Me: I’m so wet right now looking at it.
His reply came almost instantly.
Karan: Come to my room. Dad is still sleeping. Door is unlocked.
My heart hammered wildly. Arjun was still at his friend’s place(he went after dinner) and wouldn’t be back until afternoon. His father was back home from yesterday's office dinner but usually slept till 9-10 AM on weekends. This was risky as hell… but the risk only made me hornier.
I didn’t even bother wearing a bra. I slipped on the same pink crop top from last night and a tiny pair of black shorts with no panties. My nipples were rock hard, clearly visible. My pussy was leaking down my thighs as I quietly opened the guest room door.
The house was silent except for the faint sound of the ceiling fan. I tiptoed down the hallway toward Karan’s room, every step making my heart race faster.
I pushed his door open slowly.
Karan was standing there shirtless, wearing only black boxers. His muscular body looked even better in daylight - broad chest, defined abs, strong arms. The front of his boxers was massively tented. That huge cock was straining desperately against the fabric.
The second I stepped inside and locked the door, he grabbed me.
Our mouths crashed together in a hungry, desperate kiss. No hesitation. No softness. Just pure lust. His tongue pushed into my mouth as his big hands roamed all over my body - squeezing my ass hard, sliding up under my crop top to grope my bare breasts, pinching my sensitive nipples.
“Fuck, Riya… I’ve wanted this for so long,” he growled against my lips.
I moaned into his mouth, pressing my body against him. I could feel his massive erection grinding against my stomach. It felt even bigger in person.
“I saw your pic,” I whispered breathlessly. “I need it inside me, Karan. Right now.”
He didn’t waste time. He pulled my crop top off in one motion, exposing my full breasts. His mouth attacked them immediately - sucking hard on one nipple while squeezing the other. The wet sounds of his mouth on my tits filled the room. I had to bite my lip to stay quiet because his father was somewhere down the hall.
Karan dropped to his knees, yanked my shorts down, and buried his face between my legs without warning.
“Ohhh fuck!” I gasped, grabbing his hair.
His tongue was aggressive and skilled. He licked long stripes up my soaked slit, then sucked my swollen clit hard while pushing two thick fingers inside me. He finger-fucked me fast, curling them perfectly against my G-spot while devouring my pussy like a starving man.
I was already close. Months of frustration with Arjun’s 30-second fucks had left me desperate.
“Karan… I’m gonna cum…” I whimpered.
He sucked my clit harder and pumped his fingers faster. I came violently on his face, thighs shaking, juices flooding his mouth. He kept licking through my orgasm, drinking every drop.
Before I could recover, he stood up, pushed me onto his bed on all fours, and pulled his boxers down.
His cock sprang free. Even bigger in real life. Thick, veiny, and rock hard. The head was leaking precum heavily.
He rubbed it along my dripping slit, teasing my entrance.
“You sure you want this?” he asked, voice rough. “My brother’s girlfriend?”
“I’m your slut today,” I moaned, pushing back against him. “Fuck me, Karan. Ruin me.”
He grabbed my hips and thrust forward.
The stretch was intense. I cried out into the pillow as his thick cock forced my tight walls open. Inch after inch pushed deeper than Arjun had ever reached. When he finally bottomed out, I felt so deliciously full I almost came again.
“Fuck… you’re so tight, Riya,” he groaned.
Then he started fucking me properly.
Hard. Deep. Relentless.
The sound of his hips slapping against my ass echoed in the room. He fucked me like an animal - long, powerful strokes that made my tits swing wildly. Every thrust hit my deepest spot. His heavy balls slapped against my clit.
“Yes! Harder!” I moaned into the pillow. “Fuck me like Arjun never could!”
Karan grabbed my hair, pulling my head back as he pounded me. “Say that again.”
“Arjun can’t fuck me like this! His brother is destroying my pussy!” I gasped.
He slapped my ass hard, the sound sharp and loud. The risk of his father waking up made everything ten times hotter. Karan leaned over me, biting my shoulder while railing me mercilessly. His muscular chest pressed against my back, sweat mixing between us.
He changed positions - flipping me onto my back, pushing my legs up to my shoulders, and sliding back inside in one smooth thrust. This angle let him go impossibly deep. I could see his thick cock disappearing into my shaved pussy again and again.
“Look at me while I fuck you,” he commanded.
I stared into his eyes as he destroyed me. His abs flexed with every powerful thrust. The wet, obscene sounds of my soaked pussy taking his big cock filled the room.
I came again - hard. My walls clenched around him like a vice as waves of pleasure crashed through me. Karan didn’t slow down. He fucked me through my orgasm, making me squirt a little around his cock.
“I’m close,” he growled.
“Cum inside me,” I begged desperately. “Fill me up, Karan. I want your load deep.”
With a deep grunt, he buried himself to the balls and exploded. I felt thick, hot ropes of cum flooding my womb - pulse after pulse. So much cum that it started leaking out around his cock while he was still inside me.
We stayed locked together, panting, kissing sloppily. His cock was still twitching inside me.
But we weren’t done.
He stayed hard. After a few minutes, he started moving again - slow, deep strokes, fucking his own cum deeper into me. This second round was slower but even more intense. He sucked on my tits, bit my neck (careful not to leave obvious marks), and whispered filthy things in my ear.
“You’re mine now, Riya. Every time Arjun fucks you, my cum will still be inside this pussy.”
I came two more times before he finally filled me with a second massive load.
By the time we finished, it was almost 9 AM. We were both sweaty and exhausted. His room smelled of sex. My pussy was red, swollen, and leaking his cum down my thighs.
We quickly cleaned up. I slipped back into my clothes while Karan wiped the bed. Just as I was about to leave his room, we heard footsteps in the hallway.
His father was up.
Karan pulled me in for one last deep kiss before I sneaked back to the guest room, heart pounding.
I lay on the bed, legs still shaking, feeling his warm cum slowly dripping out of me. My phone buzzed.
Karan: That was the best sex of my life. Can’t stop thinking about your pussy.
I smiled, rubbing my sensitive clit gently while more of his cum leaked out.
This was just the beginning. I had cheated on Arjun with his own younger brother… and I already knew I was going to do it again and again.
I was addicted.