I found my mom's nud*s

My name is vikas, I'm from India. I'm 19 years old. So, today i'm gonna confess something that has been in my mind for a while. So, one day when I was using my mom's phone (because I wanted to send some of my pics to my phone) and when I opened the gallery, the first that I saw was some of her nud*s(and there were 2 videos also) . I was literally shocked. I did'nt know what to do. I had gut feeling that she's cheating on my dad. So, I opened Whatsapp. I saw her chat with a guy named suraj. To my my surprise, I recognised that face, and he was none other than my cousin Brother. I feel cheated.