My hubby had a fling a while back, with a co-worker. He ended it, though they see each other everyday. My question really is, he took her picture to put with her phone number. I feel that it was wrong to do that (obviously) as she is the "other woman", he says it was an innocent thing and deleted it when I confronted him about it. Was I overreacting? Or is he just an idiot that does not think before acting?

He has her number because he is her boss and they are required the cell phone numbers of everyone who works in the office handy.