Suspicious on my wife, Now I am shocked

I have been suspicious of wife recently and tried to find out what was going on. She speaks on phone, texting and mor than usual business meetings. I did follow her few times and could not find anything. I travel for work couple of times a months and tried to set a camera to record something. For around 8-9 months, i did not find anything unusual in the records and I was a bit relieved. Till recently, whey I just checked the records randomly, and I got shocked by the photos as she has been cheating. I am really shocked, distracted and lost all my focus. I cannot spend time on my work or my children. Even I lost weights due to struggle with my daily eating. My sleep is also terrible and going through lots of nightmares. I would like to talk about this with her and do not know how to prove it. I fear about telling her about camera as I am scared of her reaction or possible violence. We have little children at house and het anger always scare children. I am looking for a peaceful conversation or resolution. I cannot continue like this. Any idea please?