After having sex with Eva until she couldn't take it anymore, Shin was ready to move on to his next target.
He could hear the soft moans, as well as the wet sounds of an extremely perverted pussy being used.
HE burst the door open to reveal Rika sprawled on the floor. Her legs were wide open, her sexual juices making a mess everywhere.
She had one vibrator deep inside her horny cunt and another held in her left hand, as she pressed it directly against her clit. Juices of arousal pulled under her ass like a filthy puddle.
There was a shirt over her mouth, which she bit down on with all her force, desperately trying to muffle her moans.
Her tits dominated the view. They were massive milk-bags jiggling with every plunge, nipples protruding like thumbs, hypersensitive and begging for abuse.
Rika's eyes snapped open as she noticed Shin storming in.
She instantaneously felt a rush of embarrassment and fear. However, her pussy clenched harder around the buzzing toy.
The shame was what pushed her to an orgasm.
The soaked shirt fell away as she opened her mouth impossibly wide. A bestial moan tore from her throat.
Her whole body jerked and trembled uncontrollably, those monstrous tits bouncing.
She squirted a fresh gush of slut-juice that filled the room with her musky, aroused stench.
"Fuck!" She murmured weakly right after.
She wanted to stop masturbating, but the desire repressed for so long wouldn't let her show even a bit of dignity to her nephew.
"I'm sorry for showing such a pathetic sight!" She groaned softly, unable to control her own body. "I… I can't control myself, I'm sorry!"
The scene was extremely sexy. But Shin couldn't help but notice the tears that were beginning to stream down the woman's face.
"There's nothing pathetic about it, Aunt," Shin said, approaching her.
He took his aunt's right hand and brought it to his throbbing penis.
"Can't you see, you're the one who made me like this?" He whispered.
Then he took the vibrator she was holding and yanked it against her sensitive nipples.
"Aunt, I want you," he whispered in her ear. "Would you let me fuck your massive tits. The tits that made me so horny."
He pressed the vibrator even more against her nipples, the massive breast deforming under the pressure. And soon Rika's body was trembling again, and she came hard.
"But… you have a girlfriend. You have no reason to have sex with an old fat old lady like me," she whispered.
"The only thing fat about you is these filthy cow tits," he said, slapping one of them hard enough to leave a handprint.
He knew Rika's weak point was her extremely sensitive boobs. And he also knew she liked rough sex.
"Eva is much prettier than me, she is so beautiful, so perfect.
"But I want you, no one else," Shin commented, aligning his cock to her wet entrance.
He removed the vibrator shoved deep in her pussy. Then pressed just the tip of his cock, teasing the woman.
"I love Eva, but I also love you, aunt," he declared, pushing just an inch. "And right now, the only thing I can think about is fucking your wet cunt. That is the only thing I desire, because you are too hot, aunt."
Shin said all this while roughly grabbing the woman's two enormous breasts, twisting her nipples.
Any other girl would scream in pain at being treated like that and would hate it. However, Rika only groaned louder; she didn't even feel pain.
"Please, let me fuck you, aunt?" He almost begged as he pushed on more inches of his cock.
As expected, Rika's pussy was absolutely obscene. While its walls squeezed Shin's cock tightly, leaving no space, it could easily stretch to accommodate more of his cock.
It really was a pussy made to be fucked, especially made to be destroyed by huge cocks like her nephew's.
"Fuck, you can do whatever with my body, I can't stop you."
Shin checked, and her lust had reached 93%, a good number, but he still had a good margin to push it higher.
Shin smirked, stripping off his shirt and tossing it at her face, letting her inhale the sweat-soaked fabric infused with his manly musk.
"Fuck!" She moaned just feeling that sent.
"Here I go," he said.
And then Shin rammed in without mercy, stretching her perverted hole to its limits, her giant tits bouncing like overinflated balloons with each savage pound.
Then the man grabbed onto those huge titis, using them to gain leverage to fuck her even harder. The bobs were starched, and grabbed with such violence you could expect them to tear in half.
But on the contrary, they were barely damaged. They were boobs obscenely big made for fucking.
"Fuck!" Shin grunted. "Did you know, Aunt, I can't fuck any other girl as ruthlessly as I fuck you. You are special."
"So fuck me as rough as you want, dear!" Rika moaned.
She clearly loved the compliment. Her lust suddenly rose to 97%.
That was impressive, as any number approved 95% was almost impossible to get. The hardship of each 1% improvement increased exponentially after passing the 90% threshold.
The intensity between them grew until Shin found a powerful rhythm. He hammered her cunt nonstop, taking care of her pent-up lust.
With every deep, purposeful thrust, he brought his aunt closer to the edge, again and again, until her pleasure crested in wave after shuddering wave.
They moved together through the night, exploring each other with a hungry curiosity. Hours later, breathless and spent, Rika rose above him.
She aligned her soaked cunt to that beast and moved down in a single powerful motion. And soon she was riding that cock like a slut.
"Oh… God." She moaned.
Rika's massive breasts slammed together with each frantic bounce.
Shin gripped her hips, driving up into her with brutal, upward thrusts that made her whole body jolt.
Her breasts swung wildly, nipples hard and abused, the sound of skin slapping against skin echoing in the room.
He sat up, capturing one heavy mound in his mouth, biting and sucking her obscenely big nipples.
"SHIN! I'M…I'M GOING TO…!" Her voice shattered as the climax ripped through her.
Her walls clamped and fluttered around his cock, but Shin did not stop. He pistoned into her through the orgasm, extending it into a constant ecstasy of pleasure.
Rika's mind couldn't process all of that. Her body trembled, her eyes rolling back, and she felt the world getting darker.
She had spent everydrop of energy on that brutal fuck. Rika felt a full-body tremor. All strength was drained from her.
Unable to hold herself, she collapsed forward. Her enormous breasts flattered against Shin's chest. She was utterly broken, unable to even lift a finger.
Through the haze, a spike of anxiety pierced her. He was still rock-hard inside her. He hadn't come.
She wondered if she was not good enough to satisfy him. A fear crept into her chest. Shin would definitely throw her away if she weren't able to make him cum properly. He had a beautiful girlfriend and definitely had other good options to choose from.
So, remembering what she had heard Eva saying earlier, she whispered:
"Don't… stop. Make me your fucktoy… your cumbucket. You can just fuck me until you're satisfied. Please…"
Rika expected Shin to fuck her body however he wanted, but he stopped there. His hands, which had been so violently grabbing her breasts, gently tickled her nipples.
The man carefully rolled them to their sides, slipping out of her, and scooped her limp form into his arms.
Shin carried her from the soaked floor to the plush sofa, laying her down with tenderness. Rika felt truly embraced at that moment.
Her anxiety subsided, and she slowly closed her eyes, falling into a deep sleep.
"Good…" the man murmured.
He knew how broken Rika was because of her own sister. She had wound up becoming nothing more than a second woman to Shin's father, forced to do everything possible just for a little attention.
For that reason, she was desperate, trying to please without caring about herself.
Shin could exploit it and make her do everything for him, but that was not the end he wanted for her.
"I will make you truly happy, as one of my wives," he murmured.
He fetched a warm cloth and meticulously cleaned the sweat and sex from her trembling body.
He tidied the room, disposing of the used vibrator, gathering their discarded clothes, and cleaning the floor.
They had made a really big mess.
Only when the room was orderly and quiet did he return. He knelt by the sofa, watching her exhausted sleep for a moment before leaning in.
He brushed his lips against hers in a feather-light, lingering kiss. Rika's eyes fluttered open, finding his gaze calm and sated.
"Shin… you didn't…"
"I want to talk with you, aunt."