My husband is deployed heading to Iraq, currently in Kuwait.?

I found an email in his account (we have each others pwords) that he sent to a woman that works at the USO where he goes to call and email me. In the email he stated that he wasn't the type to bullsh** and he would get right to the point. He told her that he thought she was pretty and wanted to get to know her better. If she was interested he said to email him. I see that he had to have come in contact with her to see what she looks like. He went 4 days without calling me and didn't even read my emails to him when he was emailing her. Should I be concerned about adultery? As far as I know it hasn't happened in the past. My husband has only been deployed for 2 weeks of a year tour. Please help me!