What does he mean by "taken care of"? Did he order a hit on her?
Most people end up leaving a few things undone when they have to go away somewhere. It's pretty normal... it doesn't mean he did it out of spite, and it doesn't mean he's a loser.
He'll either behave himself or he won't. If he's going to misbehave, you worrying about it isn't going to stop him. All you can do to discourage it is to be the better woman... be happy and upbeat and loving whenever you talk to him, and be a person that he'd rather talk to than any other woman. If he's crazy enough to choose someone else when you're doing that, at least you know how to keep a real man happy when you find one.
In the meantime, staying in your marriage trusting him and waiting for him costs you very little at this point - there's not really anything you can't do with yourself with him gone that you'd be able to do if you dumped him (well, unless there's some other single guy that you know you'd enjoy reaching out to if your marriage ended, and I don't get the sense that that's true in your case).
a fine and enviable madness, this delusion that all questions have answers, and nothing is beyond the reach of a strong left arm.
