I discovered my girlfriend was cheating because her best friend sent me a voice note she wasn’t supposed to hear. My girlfriend, Chloe, and I had been dating for two years. We rarely argued, and I had never given her a reason to believe I was unfaithful. Her best friend, Melissa, was always around. They went shopping together, attended parties, and sometimes spent entire weekends together. I never had a problem with their friendship. One Friday afternoon, Melissa sent me a voice note by mistake. At first, I thought it was an ordinary message because I could hear people laughing in the background. Then I heard Chloe’s voice. She was talking about a man named Daniel. “I told him my boyfriend was working late, so he said he could come over tonight,” she said. Melissa laughed and asked, “What if your boyfriend calls?” Chloe replied, “I’ll just tell him I’m sleeping. He never checks on me twice.” I listened to the recording again. Then I listened a third time. I wanted to believe I had misunderstood something, but I recognized Chloe’s voice immediately. I called her. She didn’t answer. A few minutes later, Melissa sent another message. “Please pretend you didn’t hear that. I sent the wrong recording.” That message confirmed what I had feared. I replied, “How long has this been happening?” She didn’t respond for almost an hour. Eventually, she called me and admitted that she had known about Chloe’s relationship with Daniel for several months. She said she had repeatedly encouraged Chloe to end it, but Chloe had refused. I asked why she had continued covering for her. Melissa explained that she was afraid of losing her best friend. I understood that fear, but it didn’t make the betrayal easier to accept. That evening, Chloe finally called me.