Simon brought his hand down hard on Sofia's other ass cheek with a loud, sharp slap. The soft, pale globe of flesh rippled violently from the impact, a fresh red handprint blooming brightly against her smooth skin. Sofia's body jolted forward, a deep, ecstatic moan tearing from her throat as pleasure flooded through her.
Her eyes rolled back slightly, lashes fluttering, her face twisting into an expression of pure bliss I had never seen on my gentle older sister before. The thick, veiny length of Simon's cock kept stretching her pink, glistening pussy wide open with every heavy thrust, the wet, rhythmic squelching sounds growing louder and filthier as he drove into her welcoming heat.
I couldn't tear my eyes away from the window. How could they fuck like this? Sofia looked so soft and motherly, yet here she was taking every brutal inch like she was made for it. I wondered if they did this every single day — if this strong, heavy-bellied man pounded my sister into the mattress with this kind of raw intensity on a regular basis. The stamina he showed was almost unreal, his hips slamming forward again and again without any sign of slowing down.
"Ah… fuck… that feels… so good," Sofia moaned breathlessly, her voice trembling with overwhelming pleasure as Simon's thick cock dragged against every sensitive spot inside her.
"I know you love this position, my love." Simon growled affectionately, his voice deep and full of adoration even as he fucked her harder.
He gave her ass another firm slap, the sound cracking through the room, before grabbing both of her wrists. With a powerful pull, he yanked her arms back, lifting her upper body off the bed. Sofia's massive, milk-heavy breasts swung freely beneath her, the heavy orbs bouncing wildly as he held her in that arched, submissive position.
Her nipples leaked thin streams of white milk that dripped onto the sheets below, her soft, overflowing tits jiggling with every powerful thrust.
"Oh god… I don't care anymore…" Sofia gasped, her voice breaking into needy whimpers. "Fill me up… let's have another baby… please, my love…"
Simon's eyes darkened with lust and deep affection.
"As you wish, my dear~" he replied tenderly, his voice thick with emotion.
He increased his pace dramatically. The loud, wet slapping sounds of his hips smacking against her plump ass filled the bedroom as he started fucking her with renewed, almost animalistic energy.
Her bubble-shaped ass cheeks wobbled and rippled endlessly with every deep, punishing thrust, the red handprints glowing brighter on her pale skin. Sofia's massive breasts swayed heavily beneath her, milk spraying lightly with the force of his movements as her body rocked forward again and again.
The sight was overwhelming. Simon's thick cock disappeared completely inside her with every stroke, stretching her pussy lips obscenely around his girth, creamy juices coating his shaft and dripping down her thighs.
I couldn't hold back anymore. My hand pumped my own throbbing cock faster outside the window, the cold air doing nothing to cool the heat burning through me. The contrast between Sofia's gentle personality and the way she was moaning for another baby while getting pounded so hard pushed me over the edge. With a choked groan, I came hard, thick ropes of cum shooting out onto the wall beneath the window as my body shuddered with release.
Inside the room, Simon let out a deep, satisfied groan. He buried himself to the hilt one final time, his thick cock pulsing powerfully as he filled Sofia's womb with heavy, endless spurts of hot cum. Sofia cried out in ecstasy, her pussy clenching and fluttering around him as another powerful orgasm washed over her. Her body trembled violently, milk leaking freely from her nipples as she rode out the waves of pleasure, her soft, curvy form glowing with sweat and satisfaction.
They stayed locked together for a long moment, Simon gently kissing her back and shoulders while whispering loving words I couldn't quite hear. Sofia's face showed pure contentment, a soft, blissful smile on her lips as she caught her breath.
I took a long, shaky breath, trying to compose myself as I tucked my spent cock back into my pants. But just as I started to step down from the bucket, a small noise to my left made my head snap around.
The same boy from earlier was standing there, phone held up, clearly recording me. His eyes were wide with shock and excitement.
My heart dropped straight into my stomach. My breath hitched sharply as the realization crashed over me — he had recorded everything. Me watching my sister get fucked. Me jerking off to it.
"No…" I whispered in horror.
Before I could say anything else, the boy turned and ran away as fast as his legs could carry him.
I jumped down from the bucket, grabbing my head in panic. What the fuck was I doing? He had recorded me. Everything, my hand on my cock, the whole filthy scene. Cold dread washed over me as I stood there frozen for a moment.
After a few minutes of cursing myself and panicking, I tried to calm down. We don't know each other. Maybe I'll never see him again. It was a weak hope, but it was all I had. I still needed to deliver the bag to Sofia and leave as quickly as possible before anything else went wrong.
Shaking my head hard, I picked up the bag and forced myself toward the front door.
To be continued...
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