The Big Black Bull - Part One
by Thomas Spencer
Copyright© 2025 by Thomas Spencer
Erotica Sex Story: Mark's deepest, darkest fantasy is about to come true... After confessing his desire to watch his wife Sarah be thoroughly dominated by a well-hung black bull, their marriage is rocked by erotic new possibilities. Sarah explores her pent-up lust as she gives herself to a massive, muscular ebony stud, fulfilling Mark's ultimate cuckold dream.
Caution: This Erotica Sex Story contains strong sexual content, including Ma/Fa Consensual Romantic Heterosexual Fiction Cheating Cuckold Sharing Slut Wife Wimp Husband Swinging Black Male White Female Anal Sex Analingus Cream Pie Oral Sex Size .
Sarah awoke to the sound of her alarm blaring, the harsh buzzing penetrating through the fog of sleep that clouded her mind. She reached out and slapped the snooze button, nestling back into the warm embrace of her pillow.
Beside her, Mark stirred, his arm flopping onto her stomach in a half-asleep gesture of affection. Sarah sighed, carefully extracting herself from his grasp and swinging her legs over the side of the bed. Another day, another dollar.
She padded to the bathroom, flipping on the harsh fluorescent light and blinking against the sudden brightness. In the mirror, her reflection stared back at her - tired eyes, slumped shoulders, a body that had seen better days. Thirty-five years of marriage and four children had taken their toll, and it showed.
Sarah went through the motions of her morning routine, splashing water on her face, brushing her teeth, running a comb through her tangled hair. She caught a glimpse of herself in the mirror again and sighed. When was the last time Mark had even looked at her with desire? When was the last time they’d had sex that wasn’t quick and perfunctory, barely more than a task to be completed?
As she pulled on her robe and made her way downstairs, Sarah couldn’t help but reflect on their sex life. Or lack thereof. It seemed like all they ever did was go through the motions, like two actors playing out a tired script. The passion, the excitement, the raw animal desire that had once consumed them - it was all gone, replaced by a dull, mechanical routine.
Sarah started the coffee maker and set about preparing breakfast for the kids, her mind wandering to happier times. The early days of their relationship, when they couldn’t keep their hands off each other. The honeymoon, where they’d made love on the beach under the moonlight. The years of sneaking off for quickies in the closet or the laundry room, too horny to wait until they were alone.
But somewhere along the way, it had all fizzled out. The kids had come, followed by the long hours at work and the endless cycle of chores and responsibilities. Sex had become an afterthought, something to be squeezed in between doctor’s appointments and grocery shopping.
Sarah heard Mark’s footsteps on the stairs and braced herself for another day of polite conversation and forced smiles. They ate breakfast in near silence, the only sounds the clink of silverware against ceramic and the occasional sip of coffee.
As Sarah cleared the table, Mark cleared his throat, a nervous look on his face. “Sarah, there’s something I’ve been wanting to talk to you about,” he said, his voice hesitant.
Sarah turned to face him, her eyebrows raised in question. “What is it?”
Mark took a deep breath, his hands fidgeting in his lap. “I ... I know things haven’t been great between us lately. The sex, I mean.”
Sarah felt a flush creep up her neck, embarrassed and defensive all at once. “It’s not that bad,” she said weakly, looking away.
“It is,” Mark insisted, reaching out to take her hand. “And I think I know why.”
Sarah met his gaze, confusion and trepidation warring in her chest. “What do you mean?”
Mark took another deep breath, as if steeling himself for what he was about to say. “I ... I think I’m a cuckold,” he said finally, the words tumbling out in a rush. “I think I get off on the idea of you being with other men.”
Sarah stared at him, her mouth agape. “What? Mark, what are you talking about?”
“I’ve always been jealous when other men look at you,” he explained, his eyes downcast. “But it’s not the regular kind of jealousy. It’s ... it’s more than that. It turns me on to think about you with someone else. Someone better than me.”
Sarah felt a wave of disbelief wash over her. This was her husband, the man she’d been married to for nearly two decades. How could he feel this way? And why was she suddenly feeling a flutter of excitement in her stomach?
“I don’t know what to say,” she said finally, her voice barely above a whisper.
“I know it’s a lot to take in,” Mark said, squeezing her hand. “But I thought maybe ... maybe we could try it. Just once. To see how it feels.”
Sarah’s mind raced, a thousand thoughts swirling through her head. Could she really do this? Could she really sleep with another man, with her husband’s blessing?
And yet, as she looked into Mark’s hopeful eyes, she felt a spark of desire ignite deep inside her. The idea of being with someone new, someone exciting and different - it was thrilling in a way she hadn’t felt in years.
“Okay,” she said finally, her voice shaky but determined. “Let’s try it. Just once.”
Mark’s face broke into a wide grin, his eyes shining with relief and excitement. “Thank you,” he said, pulling her into a tight embrace. “You won’t regret it, I promise.”
As Sarah held him close, she couldn’t help but wonder what she was getting herself into. But one thing was for sure - their stale, boring sex life was about to get a whole lot more interesting.
Sarah pulled away from Mark’s embrace, her mind still reeling from his confession. “I need some time to process this,” she said, her voice shaky. “It’s a lot to take in.”
Mark nodded, his expression understanding. “Of course. Take all the time you need. Just ... think about it, okay? Think about what it would be like.”
Sarah closed her eyes, a mental image forming in her mind. Her, naked and writhing beneath the body of a strong, virile man. Mark, watching from the corner of the room, his eyes dark with desire as he touched himself.
The thought sent a shiver down her spine, and she opened her eyes to find Mark looking at her intently. “I’ll think about it,” she promised, her voice barely above a whisper.
As the day wore on, Sarah found herself unable to concentrate on anything else. She went through the motions of her daily routine - dropping the kids off at school, running errands, preparing lunch - but her mind was elsewhere.
She couldn’t stop thinking about Mark’s words, about the idea of being with another man. It was thrilling and terrifying all at once, a fantasy she had never dared to indulge in before.
As she sat at her computer later that afternoon, a sudden impulse overtook her. She opened up a web browser and began to type, her fingers flying across the keyboard.
“Cuckold fantasies,” she typed into the search bar, her heart pounding in her chest.
The results were overwhelming, a treasure trove of stories and images and videos. Sarah clicked on the first link, her eyes widening as she read the lurid details of a wife’s affair with her husband’s best friend.
She felt a dampness between her legs as she read, her breathing quickening. She knew it was wrong, but she couldn’t help herself. The idea of being wanted, desired, lusted after - it was intoxicating.
She clicked on another link, this one leading to a video of a woman being gangbanged by a group of men while her husband watched helplessly. Sarah felt a surge of heat as she watched the woman moan and scream in ecstasy, her body wracked with pleasure.
She knew she should stop, that she was only fueling the flames of her desire. But she couldn’t. She needed more, needed to know what it would feel like to be in that woman’s shoes.
She spent hours lost in the world of cuckold porn, her mind consumed with fantasies of being dominated and defiled. By the time she finally closed the browser, she was soaked and shaking, her body aching for release.
She knew then that she had to do it. She had to experience the thrill of being with another man, of being wanted in a way that Mark could never want her.
But she also knew that it wouldn’t be easy. There would be guilt, and shame, and fear. But there would also be pleasure, and excitement, and the knowledge that she was living out a fantasy that most women only dreamed about.
She waited until Mark came home from work that evening, her nerves coiled tight with anticipation. They sat at the kitchen table, picking at their dinner in silence.
Finally, Sarah took a deep breath and spoke. “I’ve been thinking about what you said earlier,” she began, her voice trembling slightly. “About the cuckold thing.”
Mark looked up at her, his eyes wide with hope. “And?”
“And ... I think I want to try it,” she said, her voice barely above a whisper. “I think I want to be with someone else.”
Mark’s face broke into a wide grin, and he reached across the table to take her hand. “Really? You do?”
Sarah nodded, a flush creeping up her neck. “But I’m scared,” she admitted. “I don’t know how to do this. I don’t know where to start.”
Mark squeezed her hand, his expression understanding. “We’ll figure it out together,” he promised. “I’ll be with you every step of the way.”
Sarah felt a rush of relief wash over her, followed by a surge of excitement. This was really happening. She was really going to go through with it.
As they finished their dinner and retired to the living room, Sarah couldn’t help but wonder what the future held. Would Mark really be okay with her being with another man? Would she really be able to go through with it?
But as she looked over at him, his eyes shining with love and acceptance, she knew that she could do anything as long as he was by her side.
The next few weeks passed in a blur of excitement and anxiety. Sarah and Mark spent hours discussing the details of her cuckold lifestyle - what kind of man she wanted to be with, what kind of things they wanted to try.
Mark took charge of finding the perfect partner for Sarah, poring over online dating profiles and setting up discreet meetings. Sarah found herself intrigued by the process, eager to meet the man who would change her life forever.
Finally, the day arrived. Sarah got dressed in a tight dress that hugged her curves, her heart pounding with anticipation. Mark drove her to the meeting place, his hands gripping the steering wheel tightly.
As they pulled up to the hotel, Sarah took a deep breath and turned to face him. “Are you sure about this?” she asked, her voice trembling.
Mark nodded, his eyes shining with determination. “I’ve never been more sure of anything in my life,” he said. “This is what we both want. What you both need.”
Sarah leaned over and kissed him softly, pouring all of her love and gratitude into the gesture. Then she got out of the car and walked towards the hotel entrance, her head held high.
She didn’t know what the future held, but she knew that she was ready to face it head-on. Ready to embrace the thrill of the unknown, ready to experience pleasure in ways she had never imagined.
As she stepped into the lobby and saw the man who would be her first cuckold bull waiting for her, she felt a wave of desire wash over her. This was it. This was the beginning of a new chapter in her life.
And she couldn’t wait to see where it would lead.
Sarah’s breath caught in her throat as she laid eyes on the towering, muscular figure of the bull Mark had arranged for her. He was everything she had fantasized about and more - tall, dark, and devastatingly handsome, with rippling abs and biceps that strained against his tight t-shirt. His black skin glistened under the hotel lobby lights, and his deep, soulful eyes seemed to pierce straight through her.
“Hi there,” Sarah said breathlessly, extending her hand. “I’m Sarah.”
The bull took her hand in his, engulfing it completely. His grip was firm and warm, sending a shiver down her spine. “Pleasure to meet you, Sarah,” he replied, his voice a low, seductive rumble. “I’m Marcus.”
Sarah felt her knees go weak as he led her towards the elevators, his hand resting possessively on the small of her back. As they stepped into the empty car, Marcus pressed the button for the top floor and turned to face her.
“You’re even more beautiful than I imagined,” he murmured, his eyes roving over her body appreciatively. “Mark didn’t do you justice.”
Sarah blushed, flattered by the compliment. “Thank you,” she said shyly. “And thank you for doing this. For me, I mean.”
Marcus smirked, his hand sliding down to cup her ass. “Oh, it’s my pleasure, baby. Trust me.”
As the elevator dinged open, Sarah felt a surge of nervous excitement. This was really happening. She was really going to sleep with another man, with her husband’s blessing.
Marcus led her down the hallway to his room, swiping his key card and pushing open the door. Sarah stepped inside, her eyes widening at the opulent suite that greeted her.
Marcus closed the door behind them and turned to face her, a predatory gleam in his eye. “Strip for me,” he commanded, his voice leaving no room for argument.
Sarah hesitated for a moment, suddenly feeling shy. But the look in Marcus’s eyes spurred her on, and she reached for the zipper of her dress.
Slowly, teasingly, she slid the garment down her body, revealing inch after inch of creamy skin. She let it pool at her feet before stepping out of it, standing before Marcus in nothing but a pair of lacy panties and a strapless bra.
Marcus let out a low whistle of approval, his eyes devouring every curve and contour of her body. “Fuck, you’re perfect,” he growled, reaching out to cup her breasts through the thin lace of her bra. “I can’t wait to get my hands on you.”
Sarah gasped as he roughly squeezed her tits, her nipples hardening instantly beneath his touch. She arched into him, craving more contact, more stimulation.
As if reading her mind, Marcus reached around and unhooked her bra, letting it fall to the floor. Her breasts sprang free, heavy and full, and he wasted no time in capturing one rosy peak between his lips.
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