Well, it could be anything, but the most probable thing is that the Mrs. or OM was confronted by someone and gave the "open marriage" excuse. Otherwise she looks trashy cheating on a deployed soldier.

My ex and I both worked on Camp Pendleton, and I had heard rumors, people hushing up when I joined a group talking and things like that. There is NOTHING like the military for rumors. Something could happen at my work, and an hour later, it is all over Iraq and Afghanistan.