He cheated on his wife with her mother in the bathhouse.

I knew this wouldn't end well. As soon as Lenka called and said her best friend had arrived and they were hanging out in the city until the morning, leaving her mother and I alone at the dacha, I immediately sensed something was wrong. But Victoria Mikhailovna, my mother-in-law, just chuckled into the phone: "Well, that's good, Sasha, I was so eager to go to the bathhouse after my long journey. Would you like to join me? I'm bored alone." I would have refused. Claim a headache, or the football game on TV. But she was already standing on the veranda threshold in her light robe, which was translucent even in the sunset. She had a figure, I must admit. For a forty-five-year-old woman, she was a real bombshell. Lenka, my wife, took after her father—slender, petite. But Victoria Mikhailovna was a force of nature. Tall, busty, with wide hips. Just like a Russian beauty from the epics, only modern and well-groomed. "What are you standing there for?" she said, walking past me into the house. "Go heat up the sauna. I'll chop up a salad and get some shot glasses. Let's relax." In short, an hour later the bathhouse was ready. On the table in the anteroom were pickles, cold meats, black bread, and an open bottle of cognac. Victoria Mikhailovna sat on a bench, one leg tucked under her. Her robe was completely open, and I could see the edge of her lace bra, barely able to contain her ample breasts. "Well, enjoy your steam," she said, handing me a shot glass. Her fingers were long and bright red. We drank. The cognac burned my throat and spread a pleasant warmth into my stomach. We undressed in silence. I quickly threw off my shorts and T-shirt and wrapped a sheet around my waist. She took her time. Slowly, she took off her robe and hung it on a hook. Under the robe was lingerie—black, lacy. Mommies. My dick twitched. A beautiful waist, and below—those wide hips. She unhooked her bra, not embarrassed in front of me, and tossed it on the bench. Her breasts were stunning. Large, heavy, with large, dark nipples that immediately hardened from the warmth. "What are you staring at?" she grinned, pulling down her panties. "You'll see everything in the steam room. Let's go." The steam room was nearly 100 degrees. We sat on the top bunk, breathing in the heat and lashing each other with birch branches. Or rather, she lashed me first. I lay on my stomach, and she lashed my back with a birch branch. With each swing, her breasts swayed, sometimes brushing my side. “Harder, Victoria Mikhailovna,” I croaked. "Just call me Vika," she corrected, spanking my butt with a broom. "We're all friends in the bathhouse." Then I steamed her. She lay on her stomach, arms spread out. I looked at her buttocks, at the sweat trickling down her lower back, and had to restrain myself from running my hand further than necessary. My sheet had been stiff for a long time. "Oh, that feels so good," she moaned. "Now give me another hundred grams and a contrast shower." We drank some more in the dressing room. I sat there naked, not even trying to cover myself because it was already pointless. My penis was hard as a rock, its head pressing against my stomach. She saw it. She saw it and smiled. "What's wrong, Sasha? Are you in a bad mood?" she asked, licking the cucumber salt off her finger. "Lenka probably doesn't spoil you often?" “Why?” I mumbled, feeling the cognac go to my head. "Come on, I see everything," she stood up and came close to me. Her hands rested on my shoulders. "You're a handsome, healthy man. You need regular release." She leaned over, and her breasts were right in front of my face. Her nipples, hard as peas, brushed against my lips. I couldn't resist. I opened my mouth and took one into my lips. She gasped and pulled my head closer to her. “Yeah, that’s it,” she breathed out. I sucked her breast like crazy, rolling one nipple with my tongue, squeezing the other with my fingers. She was soft but firm, and she smelled of sweat, birch leaves, and cognac. I pulled away for a second to kiss her on the lips. She responded greedily, biting my bottom lip with her tongue. "Let's go to the shelf," she whispered, breaking the kiss. "It's hot there." We didn't even turn on the light in the steam room; only a dim lightbulb outside provided a sliver of illumination. I pushed her onto the wide lower bench. She fell onto her back, spreading her legs. I hovered over her, kissing her neck, chest, and moving lower to her stomach. She was all wet with sweat, slippery. I spread her legs apart. Her pussy was already wet, her lips swollen. I ran my finger along her slit, and she moaned, arching. "Don't drag it out, Sasha," she croaked. "Fuck me." I placed the head of my penis at her entrance. She was hot, practically fiery. I entered slowly. It was tight inside her, but slippery. She was very wet. I entered all the way, pressing my balls against her crotch, and froze. We both exhaled. “Move,” she commanded. I started moving. Slowly at first, then faster. My cock moved back and forth inside her, making a squelching sound. She wrapped her legs around my waist, digging her nails into my back. "Harder!" she screamed. "Hit me, son-in-law!" I pounded my cock into her with all my might. The boards creaked beneath us, and brooms fell from the shelves to the floor. Her breasts shook in time with my blows, and I squeezed them, rubbing her nipples with my fingers. Her face was contorted with lust, her mouth open, and she was biting her lips. “Oh, fuck, that feels so good,” she moaned. I turned her onto her side, lifted my leg higher, and entered again. In this position, I felt all of her. There was nowhere deeper. She found her clitoris with her hand and began to rub it, looking into my eyes. “I want to cum,” she breathed out. “Come with me.” I felt myself going crazy. My cock was bouncing inside her wet hole. I sped up, thrusting into her with short, sharp strokes. "I'm cumming!" she screamed, her whole body shaking. I felt her walls squeeze my cock like a vice. It washed over me right after. I came deep inside, twitching and spilling my cum into her. We both went limp, slippery and sweaty, on that wooden shelf. We lay there in silence for a while, trying to catch our breath. My sperm began to flow out of her, mixing with her juices, running down her leg onto the counter. I caught my breath and only then realized WHAT I'd done. "Vika... this... this is wrong," I whispered, moving away. "Lenka..." "Oh, don't whine," she interrupted, stretching lazily. She sat up, spreading her legs, and I saw our marks on her again. "Lenka won't know anything. We just had a drink and a steam bath in the bathhouse." She stood up and went into the changing room without even drying herself. Her butt, wet and red, swayed in front of my nose. I followed her. In the changing room, she poured more cognac. “Go ahead, wash away your sin,” she grinned. We had a drink. I sat down on a bench, feeling like a complete idiot. And she stood in front of the mirror, fixing her hair, completely naked, and looking at herself. "You know," she said suddenly, looking at my reflection, "I'm not fucked. What about you?" My member, which had just begun to wane, twitched again. She noticed it. “That’s it,” she came up, knelt down and took my penis into her mouth. I threw my head back and moaned. She sucked expertly, deeply, with almost no gag reflex. I watched her head bob up and down, her saliva flowing down my shaft, and I knew I couldn't stop. “Enough,” I exhaled, pushing her away. “Come here.” I positioned her doggy style, bending her over the bench. I spread her buttocks and entered from behind. Deep. All the way. She moaned, bracing her hands on the bench. I fucked her doggy style, watching my balls slap against her swollen labia. I wrapped her long hair around my fist and pulled her head back. “That’s it, bitch, take it,” I growled, losing the last of my conscience. Suddenly, in the quiet of the evening, the distant sound of an engine was heard. We both froze. I froze in her, she froze beneath me. "It's Lenka," I exhaled, instantly sobering up. "Your mother!" We bounced apart as if scalded. My sperm dripped from her pussy onto the floor. Clothes were scattered all over the dressing room: her panties were hanging on a broom, my dick was still wet. "Get dressed! Quickly!" she hissed, darting about. I pulled my shorts over my wet body, trying to button them with trembling hands. She threw a robe over her naked body, not even putting on underwear. The car was already pulling into the yard. "Stay here and don't come out until I call you!" she ordered in a whisper and ran out into the changing room, closing the door to the steam room behind her, where I remained. I sat in the dark, stuffy air, my heart pounding. I heard a car door slam, the neighbor's dog barking. Voices. Lenka's laughter. She was saying something to her mother. I looked at my hands. They smelled of my mother-in-law. Everywhere. I could smell her on me, mixed with smoke and mint. The penis that had just been inside her mother now hung limply, stained with our shared filth. "Sasha! Come out and have some tea!" Lenka shouted. I exhaled. I wiped my dick on my shorts, adjusted my T-shirt, and opened the door. My wife was standing in the anteroom, setting the table, smiling and happy. Her mother sat next to me, adjusting her robe. She looked at me with a calm, slightly mocking gaze and licked her lips almost imperceptibly. "So, how's the steam room going?" Lenka asked, kissing me on the cheek. “It’s hot,” I answered hoarsely. “Very hot.”