Completely by accident noticed a message on his phone about meeting up later this week. I am not the type to snoop and he has given me no reason before not to trust him in 15 years of marriage. However looking back through the messages this will not be the first time that they have met up. He has not mentioned it once.
The thing is if he had been upfront about it I would not have been too bothered at all. I now feel hurt that he has never told me as it is as if he is hiding something. He doesn't know I have found out so I will see what excuse he comes up with on the night. I want to see him look me in the eye and lie as it would be so out of character for him and I can hardly believe he could do it. I don't know whether to say anything right away or just keep an eye on the situation.