The photo is a plain full body (fully clothed in casual looking trousers and top not overtly attractive clothing but strangely not work attire / suit etc) in the office. It is recent and in between pictures of our children which he also has on his phone but she is standing in their open plan office. I asked him about it last night and he said it was because she said she was going to lose weight (the implication being he wants to tease her about it - this is his type of personality). She is smiling in the photo but not in a provocative way. He said "anyway she is married" and then he deleted it. They get on, he admires her "because she is so efficient and hard working" but he has always denied he has any feelings for her. Our marriage is not great. what do you think? I told him to change the pin number for his phone (he knows I sometimes look at his phone and he did not ask me why i looked) because I never want to look at his phone again because this type of thing upsets me. Am I unreasonable to be upset