My wife cums with a black trainer

My name is Alexey, I'm thirty-two, and I'm a regular office guy—not a muscle man, not an alpha male, just a husband who loves his wife Olga more than anything in the world. We've been together for six years, and our sex has always been normal: gentle, predictable, a couple of times a week. But Olga... she changed after we started going to this new fitness center on the outskirts. She's twenty-eight, and her body is on fire: firm C-cup breasts, a flat stomach, a round ass that I loved to squeeze at night. She's always been active, but when that black trainer Darius showed up, everything went to hell. Darius was a monster. Two meters tall, shoulders wider than a doorway, skin the color of dark chocolate, muscles rolling beneath him like steel cables. All the women in the gym were staring at him, and he'd smile that toothy grin and say in a deep bass voice, "Lady, let's do another set." Olga signed up for his personal training a month ago. At first, I laughed—so what, let her work out. But then I noticed her coming home: her eyes shining, her cheeks flushed, and a wet spot in her panties. "The trainer says I'm making progress," she'd say, and immediately go for a kiss. I could smell his cologne on her skin. And instead of jealousy, my dick would get hard in my pants. I started fantasizing: I imagined this black man fucking her, and I'd watch. And jerk off to the sight. It all started innocently. One evening, Olga came home from training and said, "Lyosha, Darius suggested a home session. It's more comfortable at home, without the crowds. Do you mind?" I shrugged, but my insides sank. "Sure, let's do it." She smiled so slyly, as if she already knew how it would end. I lay awake all night, imagining him entering our apartment, his huge hands resting on her waist. In the morning, I didn't even go to work—I said I was sick. I sat in the corner of the bedroom behind the curtain, phone in hand, as if I were filming a video for myself. My heart was pounding, my dick was already half-hard in my underwear. It was my first step into the abyss. That day, Darius came to our house. He was wearing tight shorts and a sleeveless T-shirt—his muscles glistened with oil or sweat, his dick a huge bulge even when flaccid. Olga opened the door in short leggings and a tank top, her nipples already poking through the fabric. "Hi, gorgeous," he boomed in his deep voice, wrapping his arms around her waist as if they were old friends. I sat in the corner of the bedroom, behind the half-closed door, and could see everything through the crack. "Lyosha's home, but he's not bothering us, he's working in the office," she lied, winking at me in the darkness. Darius nodded: "Okay, then let's warm up." They started in the living room but quickly moved to the bedroom—"the mat's better there." Olga lay down on the rug, and Darius stood over her, adjusting her position. His hands slid over her thighs, his fingers lightly brushing the insides. "Breathe deeper, baby. Feel the muscles stretching?" he said. Olga moaned softly, "Yes... Darius, you're so strong." I saw her eyes roll back in her head, how she deliberately arched her back, exposing her ass. The flirtation escalated before our eyes. She asked, "Are you always this... big all over?" He laughed, "Want to check, baby?" And then she turned to me, as if she knew I was there: "Lyosha, come out. I want you to watch. That's what you wanted, right?" I walked out, red as a lobster, my dick already sticking out of my pants. Darius looked at me calmly: “Your man? Cool. Some people like to watch. Sit in the corner and don’t bother me.” Olga came over and kissed me on the cheek: “Honey, I love you. But today I want him. Badly.” I nodded, sat down in the chair in the corner, unzipped my fly, and pulled out my average-sized dick, about 14 cm long. It was hard, but compared to what I saw next… fucking hell. The action built slowly, like a tight spring. At first, they were just practicing, but every movement was a provocation. Darius forced Olga to squat between his legs, her face ten centimeters from his enormous bulge. "Lower, baby, feel the pressure," he commanded. She was breathing heavily, sweat running down her neck, dripping between her breasts. I jerked off slowly, clenching my fist, and thought, "Fuck, this is really happening. My wife wants that black cock." Shame and arousal warred inside me—I hated myself for enjoying it, but my cock throbbed harder with every moan she made. Then she "accidentally" brushed his shorts with her hand. "Oh, sorry... is it really that big?" Darius chuckled. "Want to touch it? Your man doesn't mind." Olga looked at me. "Lyosha?" I just nodded and sped up. She knelt down on the rug and pulled his shorts down. And there it fell—a black, thick, veiny cock, about twenty-five centimeters long, the head like a fist, the balls heavy and full. Olga gasped. "Mommy... it's bigger than my forearm." She grabbed it with both hands, but her fingers wouldn't close. "Suck it, slut," Darius said quietly. And she began. I watched her lips stretch around that black cock, drool running down its shaft, choking and coughing, but not stopping. "Swallow it deeper, bitch," he growled, holding her by the hair. I jerked off in the corner, feeling my balls swell, but I didn't come—I wanted to stretch it out. They moved to the bed. Darius tore off her leggings—her panties were soaking wet. He pushed them aside and stuck two thick fingers into her cunt. "Look, horny one, how she's flowing for me!" Olga squealed, "Yes, deeper with your fingers! I'm all wet because of you!" I saw her juices splashing onto his hand, her clit swollen and protruding. Inside, I thought, "This is my wife, but now she's his bitch." And it turned me on, my knees shaking. Darius finally entered her. He positioned Olga doggy style on the edge of the bed, facing me. "Watch him while I fuck you," he said. His huge black cock pressed against her pink cunt. The head parted her lips, and he began to enter—slowly, centimeter by centimeter. Olga screamed, "Aaah, fuck, he's tearing me apart! So thick... deeper, Darius, fuck my cunt!" He drove all of him in—his balls slapped against her clit, his veiny shaft glistening with her juices. The rhythm was frantic: powerful, deep thrusts, each time he pulled out almost completely and slammed back in, stretching her hole to its limit. I saw how her pussy gripped his black cock, how her lips turned outward, how her sperm splashed with each exit. Then he flipped her over onto her back, lifted her legs to her shoulders, and entered her missionary style. "Watch, husband, how I fill your wife." Olga came for the first time—her body shook, her eyes rolled back in her head, she screamed, "I'm cumming! Fuck, he's hitting my uterus!" Juices gushed like a fountain, dripping onto the sheets. Darius didn't stop—he sped up, sweat pouring from his black body onto her tits. I jerked off like crazy, my fist flying over my cock, but I held on. The second act was even rougher. He put her on top of me, face to face, but with his cock in her from behind. "Hold her, man." I grabbed her around the waist, and Darius fucked me from behind, his balls slapping my hands. Olga kissed my lips, moaning into my mouth: "Can you feel how he's fucking me? I've never felt this good." I felt the thrusts through her body. Then she sucked him again, kneeling between us, one cock in her mouth, the other—mine—in her hand. She jerked me off and swallowed him balls deep, drool and tears streaming down her face. Darius lay on his back, Olga mounted him, reverse cowgirl, facing me. She bounced like crazy: her ass slapped his hips, her cunt swallowed his entire black shaft. "Watch, Lyosha, how I'm impaling myself on it!" I knelt in front of them, jerking off. Darius growled, "I'm going to fill you up, bitch!" Olga came a second time—screaming, her body convulsing, her cunt squeezing his black cock, her juices flooding his balls. Then he exploded—pulled out and started cumming. The first streams hit her face and mouth—thick, white black cum, gallons of it. She opened her mouth, swallowing, the rest running down her tits and stomach. I couldn't take it anymore—I came at the same time, my sperm spraying all over her legs and the floor. Darius continued to jerk off and squeezed another portion onto her pussy. The aftertaste was quiet. Olga lay on the bed, covered in cum—her face, tits, and pussy glistened. Darius stood up and clapped me on the shoulder: "Good man. If you want to do it again, call me." He got dressed and left. I went up to Olga, she hugged me, kissed me—the taste of his cum was still in my mouth. "Thank you, honey... I came so hard. Did you see how he filled me?" I nodded, my cock starting to harden again. We lay down together, and I licked her body—licking his cum off her pussy, mixed with her juices. That night we fucked ourselves—gently, but differently. I felt her pussy widen after him. We didn't talk about love or jealousy—only about how fucking amazing it was.