Kisa (a name, likely a pet's name)

And then the doorbell rang. Your heart started pounding wildly in your chest. You took a deep breath, trying to calm yourself, and went to answer it. When you opened the door, Vanya froze. His eyes, always radiating warmth and love, widened in surprise, then filled with concern. You stood before him, tear-stained, with reddened eyes and a puffy face. "Kitten, what's wrong? Why are you crying?" he asked, his voice worried and alarmed. He stepped into the apartment, forgetting his coat, and immediately pulled you into his arms. You clung to him, pressing yourself tightly against him, sobbing softly. His embrace had always been a refuge for you, a place to escape from adversity. But today, even his embrace couldn't dull the pain that was tearing you apart inside. "What's wrong, honey? What happened?" the guy asked quietly, stroking your head, trying to calm you down. You knew you couldn't hide the truth for long. And now, in his arms, you realized you couldn't anymore. You didn't want to anymore. “Vanya... I cheated on you...” you said through sobs, the words coming with difficulty. There was silence. A dead silence, more deafening than any screams. Vanya froze. His embrace loosened, his hands stopped stroking your head. He pulled away. His gaze, which a second ago had been full of care and tenderness, instantly changed. His eyes reflected disbelief, pain, anger. His face became stern, his cheekbones tense. He looked at you, not believing his ears. "What the fuck did you do?!" he blurted out, his voice rough and harsh. You flinched at his tone. He'd never spoken to you like that before. But you knew you deserved it. You knew you'd caused him unbearable pain. “I… I don’t know how this happened…” you stammered, trying to explain, but the words stuck in your throat. He took a step back, looking at you with disdain. "How the fuck did this happen?" he repeated, his voice shaking with rage. "You bitch, you just went and slept with another guy?"