Wife I/M with wannabe lover while I write this

As I write this my wife is in her office-room on a computer I/M with a guy she met on the net and who wants to stick his pole in her pussy. They have been Emailing each other for some time, sending each other sexually revealing pictures, carrying on with sex-dirty talk about what they are going to do to each other when they finally get naked together etc. The anticipation is *******ing me, but whenever I try to walk in on her to see what they are typing to each other she jumps up and will not let me look. She says he lives about two hours away and has not met him in permister yet. I made her promise to tell me when they do finally arrange to meet, if for nothing else, for her own safety as we really only know what he's telling her., and it may be the truth or a lie. We know nothing about this guy, and there's always an element of danger when a woman meets a stranger. I want to go with her when she finally meets him, but she thinks he may be intimidated by my presence and says she will consider taking me, but is not sure if she will or not. Now I am afraid she may arrange to meet with him without me knowing it in advance. I am trying to convince her that taking me would be the smart thing to do, and even if I cant watch them together I can at least hang around outside his place or the hotel or wherever they meet. I would not want anything bad to happen to her, even though it turns me on to know she's probably going to get her brains fucked out...I just would not forgive myself if he turned up to be a weird-o and hurts her. There is always that danger until we actually get to know what he is really like. I sure hope she sees it my way and does the sensible thing. Has anyone been faced with a similar situation, and how did you handle it? Thanks for any tips.