Marcus wasn't finished with Sarah yet. With a wicked grin, he flipped her over onto her stomach and yanked her hips up into the air, exposing her tight little asshole to his hungry gaze.
"I think it's time I took this sweet ass for a ride," he purred, spitting crudely into his palm and working some of his own saliva into the puckered hole. "I want to make sure you're thoroughly used by the time your husband comes to clean up my mess."
Sarah whimpered in anticipation, reaching back to spread herself open for him. She had never been taken anally before - Mark had always been too timid to attempt it - but the thought of Marcus's massive cock spearing into her virgin ass made her dizzy with desire.
Marcus wasted no time in pushing two thick fingers into her tight hole, scissoring them and stretching her out for his cock. Sarah yelped at the sudden intrusion, but quickly melted into the familiar throb of pleasure-pain.
"Relax, baby," Marcus coached, pumping his fingers in and out of her ass. "Just focus on breathing and let me in."
Sarah took a deep breath and forced herself to relax, focusing on the feel of Marcus's fingers invading her most intimate place. After a few moments, she felt the head of his cock pressing against her entrance, the blunt tip nudging insistently at her resistant sphincter.
"Fuck," Marcus grunted as he began to push forward, slowly but inexorably working his way into Sarah's tight passage. "You're so fucking tight back here. Goddamn."
Sarah cried out as he breached her, the burning stretch of his cock splitting her open nearly unbearable. But as he paused to let her adjust, she felt a strange kind of pleasure building deep in her core - dark and taboo and utterly delicious.
"Please," she begged, arching back into him. "Please fuck my ass."
Marcus needed no further encouragement. With a low groan, he started to move, pulling out slowly before slamming back into her with a force that rattled her very bones.
Sarah wailed in ecstasy as he fucked her ass with deep, powerful strokes, each one sending jolts of pleasure-pain ricocheting through her body. She could feel every thick inch of him sawing in and out of her most intimate depths, igniting nerves she never even knew she had.
"Take it, slut," Marcus growled, gripping her hips hard enough to leave bruises. "Take my big black cock in your greedy little asshole."
"Yes," Sarah hissed through clenched teeth, pushing back to meet his thrusts. "Fuck my ass harder. Ruin me for my husband."
Marcus let out a feral snarl at that, doubling his efforts and pounding into Sarah like a jackhammer. The bed creaked ominously beneath them, the headboard banging against the wall with each savage thrust.
Sarah could feel another orgasm building at the base of her spine, more intense than anything she had ever experienced before. It swelled and grew, centered in the burning heat of Marcus's cock splitting her open, until finally it exploded through her with the force of a nuclear bomb.
She screamed until she was hoarse as she came harder than she ever had in her life, her cunt gushing and her ass clenching rhythmically around Marcus's pistoning shaft. He followed a split second later, burying himself to the hilt in her spasming hole and flooding her with what felt like gallons of hot cum.
They collapsed together in a sweaty heap on the bed, chests heaving as they struggled to catch their breath. Sarah could feel Marcus's cum leaking out of her ass and pussy as they lay there, marking her as thoroughly owned and used.
Finally, after what felt like hours but was probably only minutes, Marcus pulled out of her and flopped onto his back beside her. Sarah rolled over onto her side to face him, marveling at the sheer size of him - from his broad shoulders to his washboard abs to his semi-hard cock resting against his thigh.
"Holy shit," she breathed, reaching out to run her fingers along his arm. "That was...incredible."
Marcus smirked at her awed expression, looking utterly smug and satisfied. "I'm glad you enjoyed yourself," he said smoothly. "And I have a feeling your husband is going to enjoy this next part even more."
Sarah's eyes widened as she remembered that Mark was waiting in the next room, ready to clean up the mess she had made with another man's cock. The thought sent a thrill through her - she couldn't wait to see the look on his face when he saw how thoroughly Marcus had claimed her.
With a groan of effort, Sarah rolled out of bed and staggered to the bathroom on shaking legs. She quickly cleaned herself up before grabbing a towel and heading out into the hallway.
Mark was waiting outside the door, looking nervous but excited. His eyes widened as Sarah approached him, taking in her disheveled appearance and the faint traces of cum still clinging to her skin.
"Come on," she said softly, taking his hand and leading him back into the room. "I have a surprise for you."
Marcus was lounging on the bed when they entered, looking utterly at ease in his nudity. Mark's gaze immediately zeroed in on his softening cock, which was still coated in Sarah's ass juices.
"Looks like you had quite the time with my wife," Mark said, his voice tight with a mixture of arousal and jealousy.
Marcus grinned wolfishly at him. "She's a fucking dream come true," he agreed. "And I'm not done with her yet."
Mark's eyes widened as Marcus reached for Sarah again, pulling her back onto the bed and spreading her legs wide. He could see the puffy state of her pussy and asshole - both gaping and dripping with cum - and felt a fresh surge of blood rushing to his own cock.
"Clean me up," Marcus commanded, gesturing towards Sarah's ravaged holes. "Lick up every drop of my cum like a good little cuck."
Mark hesitated for a moment before dropping to his knees between Sarah's splayed thighs. He looked up at her pleadingly, seeking permission.
Sarah nodded encouragingly at him, reaching down to stroke his hair. "Go on," she urged softly. "Clean me up so I can go home to our bed."
Mark needed no further prompting. He leaned forward and tentatively ran his tongue along Sarah's puffy slit, lapping up the mixed fluids leaking from her abused holes. The taste was musky and slightly bitter - undeniably male - and it sent a shiver down his spine.
He continued to lick and suck at Sarah's tender flesh for several long minutes, worshipping every inch of it until she was clean and shiny once more. When he finally pulled away, his chin was slick with cum and his own cock was rock hard in his pants.
Marcus chuckled darkly at Mark's obvious arousal. "Look at you," he taunted. "So hard you must be in pain. And for what? Watching another man use your wife like the dirty little slut she is."
Mark flushed but held Marcus's gaze steadily. "I know my place," he said simply. "Sarah belongs to you now."
Marcus smirked at that, reaching down to stroke his cock back to full hardness. "That's right," he agreed. "And I'm going to make sure she never forgets it."
With that, he pushed Sarah back onto the bed and rolled on top of her once more. Mark watched transfixed as Marcus positioned himself at Sarah's entrance and slid home with a grunt of satisfaction.
This time was slower, more sensual - but no less intense. Marcus took his time fucking Sarah, drawing out every thrust and savoring every inch of her wet heat. He caressed her body with reverent hands, worshipping every curve and valley until she was mewling and writhing beneath him.
Mark couldn't take his eyes off them as they made love - or rather as Marcus made love to Sarah while he watched helplessly on the sidelines. He felt like an intruder in his own marriage, a third wheel in the passionate coupling before him.
But he also couldn't deny the arousal that coursed through him at the sight - the way Marcus's strong hands gripped Sarah's hips as he thrust deep into her willing body; the way Sarah arched into every touch like a cat in heat; the erotic sound of skin slapping against skin as Marcus drove into her again and again.
He could feel his own cock throbbing painfully in his pants as he watched them fuck like animals in heat - Sarah's breathy moans mingling with Marcus's low grunts until the room was filled with nothing but their carnal cries.
It seemed like hours later when Marcus finally reached his peak once more, spilling himself deep inside Sarah's quivering pussy with a low groan of satisfaction. Sarah followed a moment later, clamping down on Marcus's twitching cock as she came apart beneath him.
They collapsed together on the bed in a tangle of sweat-slick limbs, their chests heaving as they struggled to catch their breath. Mark stood awkwardly to the side, unsure what to do or say.
Finally, Marcus rolled off Sarah with a low chuckle. "Thanks for sharing your wife with me tonight," he said to Mark with a smirk. "She was incredible."
Mark could only nod mutely in response, his mind still reeling from everything that had happened. He reached down to help Sarah off the bed, wrapping a towel around her naked body as she swayed on unsteady feet.
Together they made their way out of the hotel room and back down to the car in silence. It wasn't until they were safely ensconced in the privacy of their own home that either of them spoke.
"You okay?" Mark asked tentatively as they climbed into bed side by side.
Sarah rolled over to face him with a soft smile. "I'm more than okay," she assured him. "That was...life-changing."
Mark reached out to tuck a strand of hair behind her ear, his fingers lingering on her cheek. "I'm glad," he said simply. "And I meant what I said earlier - you belong to Marcus now. To all our bulls."
Sarah shivered at the possessive note in Mark's voice, a fresh surge of desire pooling low in her belly. "Yes," she agreed breathlessly. "I do."
They lay together in the darkness for a long moment before Sarah spoke again. "When can we do this again?" she asked, her voice filled with eager anticipation.
Mark chuckled low in his throat. "Soon," he promised. "Very soon."
With that reassurance, Sarah drifted off to sleep, dreaming of dark skin and musky scent and the delicious ache between her thighs.