Isolde slowly pulled her cock out, her violet eyes burning with pure lust as she stared at Xy'thraxxi's gaping asshole — red, stretched wide, and drooling thick ropes of warm elven cum down her golden cheeks.
— On all fours. Stick that ass up for me — Isolde ordered, her voice low and rough.
Xy'thraxxi obeyed instantly. She dropped onto her hands and knees on the bed, arching her back deeply and pushing her perfect golden ass high into the air like a desperate whore in heat. She spread her thighs wide, presenting her twitching, cum-filled hole.
Isolde spat thickly onto the alien's asshole and rubbed the swollen, glistening head of her cock against the slick ring. Then she pushed in.
At first she went slow, savoring every inch being swallowed. But halfway inside, she let out a deep, surprised moan.
— Holy fuck… — Isolde groaned, her eyes widening in pleasure. — What the hell is happening inside your ass…?
It wasn't just tight. Xy'thraxxi's asshole was alive.
The inner walls had a velvety texture, lined with thousands of tiny, warm, sucking ripples that massaged every vein of Isolde's cock, pulling her deeper in rhythmic waves. At the same time, stronger, deeper vibrations traveled along her entire shaft — hotter and more intense than anything she had felt in the alien's pussy — sending constant electric pulses of pleasure straight to her core.
— Aaaahhh… you feel it, don't you? — Xy'thraxxi moaned loudly, her voice trembling with lust. — My ass… it vibrates even stronger than my pussy… it was made to suck… to milk… to drive you completely insane…
Isolde growled and thrust forward, burying her thick cock to the hilt in one powerful stroke. The asshole clenched hard around her, the inner vibrations intensifying into long, throbbing waves that felt like the walls were licking and sucking every inch of her at once.
— Fuck… this feels incredible… — Isolde groaned, her eyes rolling back. — It's vibrating differently… deeper… hotter… like your ass is sucking me from the inside while I fuck it…
She gripped the alien's waist tightly and started pounding with heavy, brutal thrusts. Each slam made the golden ass jiggle violently.
— Nnghh… fuck my ass… harder! — Xy'thraxxi begged, pushing her ass up even higher, her black antennae shaking uncontrollably. — Feel how it massages you? How it squeezes and vibrates just to make you addicted? Use me… wreck me… I want to feel your balls slapping against me while my ass milks you!
Isolde lost control. She grabbed the alien's dark-green braids like reins and started fucking her ass with savage force.
PLAP! PLAP! PLAP! PLAP!
The wet, obscene sound of flesh slapping flesh filled the entire room. Her thick cock slid in and out, shining with juices, stretching that golden asshole wider with every thrust.
— What a dirty ass… — Isolde grunted, fucking without mercy. — It's vibrating even harder now… squeezing my cock like it wants to drain every drop of my cum… fuck, I've never felt an ass like this…
She gave the golden ass a hard slap, leaving a bright red mark, and sped up even more. Each thrust made the inner vibrations stronger, as if Xy'thraxxi's asshole was alive and starving for her cock.
Xy'thraxxi moaned like a whore, drooling onto the bed, ass pushed high and taking everything.
— Cum inside… fill my ass… I want to feel your hot cum exploding deep while it vibrates around your cock… fill me, Isolde… use me like your little alien whore!!
Isolde gave a few final brutal thrusts and came with an animalistic roar.
— Take it… take everything in your vibrating ass, you slut!!
Thick, hot jets exploded deep inside Xy'thraxxi's guts, filling her until it overflowed. White cum ran in heavy rivers down her golden ass while her asshole kept pulsing and vibrating, milking every last drop from Isolde's cock.
Isolde stayed buried to the hilt, panting, feeling the alien's ass still softly vibrating around her shaft, as if thanking her for the load.
Here's the English version of your scene with proper em dashes (—) for dialogue:
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The golden light of late afternoon streamed through the tall stained-glass windows of the Glass Conservatory, one of the most beautiful and private places in Maison Éternelle. The circular room was filled with exotic plants, hanging vines, and night-blooming flowers that released a sweet, intoxicating fragrance. In the center stood a large, low velvet chaise lounge in deep red.
Madeleine Ladle stood beside the chaise, her short maid uniform slightly disheveled from the heat. Her two scarlet braids swayed gently as she looked at Pyra'Luxa with a calm yet hungry smile.
Pyra'Luxa floated just a few inches above the floor, her flaming red hair moving like living fire around her shoulders. The tiny holographic plates of neon-pink energy barely covered her nipples and pussy, flickering softly with her growing arousal.
— You wanted somewhere more… beautiful — said Madeleine, her voice low and teasing. — This conservatory is one of my favorites in the mansion. Almost no one comes here at this hour.
Pyra'Luxa let her fiery hair burn a little brighter as she drifted closer, her gray skin glowing under the colored light.
— It's perfect… — she murmured, her voice crackling like embers. — The light, the flowers, the heat… and you.
Madeleine took a step forward until their bodies were nearly touching. She raised her hand and slowly caressed one of Pyra'Luxa's fluffy gray ears with her fingertips.
— I've been wanting to have you alone since you arrived — confessed Madeleine, her green eyes darkening with desire. — You're like living fire… I want to feel how hot you can burn.
Pyra'Luxa let out a soft, fiery moan as Madeleine's hand slid down her neck, over her collarbone, and cupped one of her large, firm breasts. The holographic pink plate flickered and vanished at the touch, leaving the rosy nipple completely exposed.
— Then don't hold back — whispered Pyra'Luxa, leaning in until her lips almost brushed Madeleine's. — I want you to fuck me right here, under this light…