The Hotel Receipt Exposed Everyone

AITA for exposing my boyfriend's biggest secret after I found out he was cheating on me with my best friend? I never thought I would find myself in such a mess but here I am. It all started three months ago when I met James. He seemed perfect. Charming, funny, and attentive. We fell fast and hard. I trusted him completely. My best friend Lisa also introduced us. She said he was a catch and I agreed. Things were amazing until last week. I was cleaning my place when I found something strange. A receipt from a hotel in the city. My heart skipped a beat. I asked James about it and he brushed it off saying he was with his cousin. But I knew something was off. I decided to check his phone. I was trembling but I had to know. That is when I saw the messages. I could not believe my eyes. James was cheating on me with Lisa. They had been meeting behind my back for weeks. I was crushed. I confronted him immediately. He tried to deny it but I had proof. I felt betrayed but I also felt furious. I decided to do something crazy. I took screenshots of all their messages and posted everything on social media. I tagged both of them. I wanted the world to know what kind of people they were. The post went viral overnight. My friends and family were shocked. Some blamed me for exposing them but others said I had no choice. The twist is that Lisa responded publicly. She apologized and admitted she was wrong. She said she was drunk and that she never wanted to hurt me. But she also revealed that James was not just cheating on me. He was also involved with her sister. I never knew she had a sister. That was the shocking part. Now I am left wondering if I did the right thing. Should I have kept quiet and just moved on? Or was exposing them the only way to get justice? What do you think?