As Eve straddled Adrian's chest, her body trembling with excitement, he thrust deeply into her, causing her breasts to heave with each powerful motion.
The rhythmic bouncing of her chest caught Sophia's eye, and with a sly grin, she leaned over, her fingers roughly fondling Eve's breasts.
Eve gasped in pleasure, her body arching into Sophia's touch, her nipples hard under the pressure of Sophia's rough kneading.
Sophia's lips curled into a smirk as she moved forward, positioning herself right above Adrian and in front of Eve, her thighs framing Adrian's head.
She presented her dripping pussy to Eve, whispering in a sultry tone, "It's your turn to taste me, just like I did to you."
Eve's eyes gleamed with lust as she leaned forward, her tongue flicking out to taste Sophia's pussy.
Adrian's thrusts grew harder as he watched, the sight of Eve's mouth on Sophia fueling his own desires.
The sound of Eve's moans vibrated against Sophia's pussy, driving Sophia wild as she roughly ground against Eve's face as she held Eve's face.
"Oh gods, yes… suck on it, Eve…" Sophia moaned, her voice thick with pleasure.
Eve's hands gripped Sophia's hips as she hungrily devoured her taking in Adrian's cum that was still insider her, the combined sensations overwhelming her as Adrian pounded into her from below.
Adrian, feeling the surge of pleasure from watching both women, had an idea that sparked in his mind.
He thought to himself, "Wouldn't it be perfect if Sophia was wearing a strap-on? Filling Eve from both ends at the same time would be incredible."
As if in response to his thoughts, a familiar ding sound echoed in his mind, and the system's voice appeared.
"Host, your wish is my command. For 1000 SP, you can purchase the 'Mana-Imbued Strap-On' with the unique feature of releasing inside the recipient when activated by mana. It also allows the wearer to feel the same pleasure a man experiences when inside a woman. Additional 500 SP gives you the ability to have it release fluid similar to semen as well."
Without hesitation, Adrian made the purchase. The strap-on materialized in his hand, a sleek, dark object humming with mana.
He slowly pulled out of Eve, causing her to whimper at the sudden emptiness. She stopped licking Sophia and, breathless, pleaded, "Don't stop, Adrian… I need you."
Adrian smirked playfully. "Oh, I'm not stopping," he said, showing her the strap-on he handed to Sophia. "Sophia's going to help me out with that."
Sophia's eyes widened with excitement as Adrian explained how the strap-on worked. She eagerly took it and began to put it on, her hands trembling slightly as she adjusted the straps around her waist.
The idea of feeling what Adrian felt when inside a woman sent a thrill through her body. Eve, who was watching in stunned silence, soon felt an undeniable excitement surge within her as well.
The thought of being filled from both her mouth and her core by the siblings made her body quiver with anticipation.
Once Sophia had strapped it on, her face flushed with lust, Adrian was about to re-enter Eve, who lay on the bed, legs spread and waiting. But Sophia stopped him, her hand on his chest as she said, "I want to feel how it is inside a woman first."
Adrian nodded, understanding the curiosity in her eyes. He got off the bed, his cock still throbbing with desire, and instructed Eve to bring her head to the edge of the bed.
Eve complied, her lips already parting in anticipation as she looked up at Adrian. Just as Sophia positioned herself behind Eve, the tip of the strap-on pressing against her wet entrance, Eve gasped.
Without warning, Sophia thrust the strap-on inside Eve's pussy. The sensation, though different, sent a jolt of pleasure through her, and the magical properties of the toy allowed her to feel the same euphoric pulse that Adrian experienced.
As Sophia moaned from the intense pleasure, Eve's body reacted to the intrusion, her core tightening around the toy.
Before Eve could fully process the overwhelming sensation of Sophia inside her, Adrian stepped forward and slid his cock into her waiting mouth.
Her lips wrapped around him eagerly, the heat of his cock filling her mouth as she moaned around him.
The vibrations of her moans sent waves of pleasure through him, and he began to thrust in time with Sophia, who was moving rhythmically behind Eve.
The siblings, now synced in their motions, filled Eve from both ends, Sophia pounding her core while Adrian thrust deeply into her mouth.
Eve's senses were overloaded. The stretch of Sophia inside her was different from Adrian but equally pleasurable, and the sensation of Adrian's cock sliding in and out of her mouth only heightened her arousal.
Every thrust pushed her deeper into lust, her moans growing louder, muffled by Adrian's presence in her throat.
Sophia, on the other hand, was experiencing a new kind of pleasure. The strap-on's magical properties sent ripples of pleasure through her, mirroring the sensations Adrian would feel inside a woman.
Each thrust sent shivers up her spine, the pressure building inside her as if she were the one being pleasured. She leaned forward, her breasts pressing against Eve's stomach, her breath hot in Eve's ear as she whispered, "How does it feel, Eve? Being filled by both of us?"
Eve tried to respond, but her words were lost as Adrian pushed deeper into her throat. She could only moan in response, her body writhing in pleasure as the siblings continued to ravage her from both sides.
Adrian, bending slightly, reached down and roughly squeezed Eve's breasts, his fingers teasing her nipples as he thrust harder into her mouth. Eve's body trembled at the overwhelming stimulation.
The sensation of being filled in her pussy and her mouth, coupled with the intense pleasure from Sophia and Adrian's movements, sent Eve spiraling into an overwhelming orgasm.
Her body convulsed, her pussy tightening around the strap-on as her mouth sucked harder on Adrian, her muffled cries of pleasure vibrating through her chest.
Sophia, feeling the tightness of Eve's pussy and the magical feedback from the strap-on, gasped, her own pleasure peaking as she thrust harder into Eve.
"Oh… gods… this feels… so good…" she moaned, her voice trembling as she squirted and she fell onto Eve's body, their breast now pressing each other.
Adrian, driven wild by the sight and sensation of Eve's moaning mouth around him, thrust one last time into her throat before releasing his semen deep insider her.
Eve greedily swallowed, her eyes now upturned with lust as she was sent into euphoria as the night continued to spiral deeper into pleasure.
Sophia then leaner over,"Give me those seeds as well", as she began kissing and sucking Eve's tongue in search for her little brother's semen.
The shared connection between the three left them gasping for breath, their bodies trembling from the intensity. The Yin-Yang Harmony Technique had heightened their pleasure as well as strengthen them.