I found my wife in awkward position

Trying to get it off my chest, I got married 2 years back with a very beautiful women. We were living a dream life together. I was earning very good with my job as well as side business. So last year I built a dream house, purchased plot, passed a plan and created villa for us. Our life was going amazing and I couldn’t ask for more. Then my life was turned upside down, one fine day I thought my wife is sleeping hence I eloped in our room without disturbing her. I found there my younger brother and her having physical activity. I was really broken, I dropped my wife to her parents’ house and my brother went to our parents house. It’s been 2 months we haven’t shared this incident with anyone neither I am not able to process how could my wife betray me (the love we formed, the bond we built was mesmerising, we never had any fights, I always took care of her like a baby, gave her everything yet she betrayed me. My younger brother is 26 unemployed, completed his PG now preparing for competitive exams (I supported him throughout his educational journey The thing is I am not able to move on wondering from how many days they were doing this, I can leave my wife now but in family functions and all I have to face my brother and I can’t do it. I am not going at my home since it reminds me of my wife, I can’t go to my parents since that would remind me of my brother’s actions, I can’t share it with someone as people would start considering my life joke. Everyday it’s eating me