This happened to a good friend of ours who was serving in Iraq. We were neighbors and when he left, his GF wasted no time in terms of entertaining other men. We watched it go on for about a month. Finally our friend, who called us almost weekly from Mosul, told my husband he suspected something was going on. It was at that time my husband told him the truth. The GF then proceeded to clean out his bank accounts. I guess it's good we told him when we did- but to do that when someone has their life on the line thousands of miles away is just morally repugnant to me.