Wow, that is hurtful. I can't believe he meant for you to see it. No matter how much it hurts, I would just hand it to him without a word. That way he knows you have seen it but he isn't getting any pressure from you about it. He is going to feel guilt! When my H was with OW I told him the same things and how he was having a great time and I was dying inside. One day he started to cry and told me he wasn't an unfeeling cold person and that this was hard on him too. I was still mad though and wasn't DBing yet so I just kept beating up on him. Now I know that he was only with OW because he was looking for comfort, something to make him feel better. He found that it didn't work and dumped her. Now we are trying to work out our R. It is a long, hard road and there will be ups and downs so be prepared. Try really hard not to say anything about his trip. Your silence will surprise him and make him think.