Should I call my husbands girlfriends husband? Thry met online and has left this morning to go to another state to meet her, I don't think she is who she says she is?

Am I to understand that your husband has a girlfriend that he met online and has left this morning to meet her. This woman that he is on his way to meet has a husband and you are thinking of contacting him to "rat" them out?

If that is what you want to call it - I guess. If her husband doesn't know I think he has a right to know/

Why don't you try to stop your husband?

The reason why I ask is this... if you knew that your husband was going to have an affair and cheat on you it is your issue with your husband. The other woman's husband may or may not care, that is not your business. Your business and your problem is with your husband and I feel that you have your hands full dealing with that and should focus your energies on him.
Secondly...
How do you know that her husband isn't dangerous. Not to say that they both aren't doing something very wrong, you just very well may put your husband in a situation that could very well harm his safety. Not to say that he wouldn't have coming to him what ever he deserves. It's just best to deal with what you are most responsible for and that is your relationship.
Just my opinion.

Let's just say they've been having a cyber affair for a while. And actually started talking on the phone about a month ago and after vacally talking to her for about 3 days he filed for divorce. So , I dug all the info I could on her and he said he even talked to her husband - so I looked him up and found no such person. All of our friends have tried to talk him out of going to meet some stranger without even trying to find outanything about this person before traveling 8 hrs to meet her. He believes everything she says ans when we talked he says "why would she lie" my response is " why would she tell the truth... this is a long story...

I understand that you are attempting to "help him"? I am not trying to be rude to you. I think that these situations happen and they are unfortunate. If your husband was so willing to leave and not give a second thought to the life he created with you than you deserve better. Easier said than done, but deal with your situation from your end and how it relates and effects you? Do you have children and are you prepared for what the future may hold?

I know this sounds like I would be doing all of this out of spite but ----- he had an affair 5 yrs into our marriage(we've just celebrated our 13th) the first affair was with a cousin of a friend of ours. All of our friends knew and no one told me until months later when my girlfriend finally sat me down and told me. If her husband doesn't know I think he has every right to know. I'm just worried about him. The things he told that she said just doesn't sound right and if believes her than then sh'e turned him dumber than a box of hammers... that's when I started digging up my own info on her but he wouldn't listen. I'm going through with the divorce no matter how this turns out and I know I should let it go and just let him fall on his face or whatever comes first but if her husband doesn't know - I feel for this guy, I've been there and done that...

No children THANK GOD FOR THAT ONE!! This is going to be a "no fault" divorce 87 days until the divorce is final..

I understand that. Once you tell someone that you love them and have been married you care and would look out for them and attempt to protect them. HOWEVER, you have done that. You went through the work to find the evidence to provide to him that this isn't in his best interest. Some people don't learn until they hit it for themselves. My fear here is that if you care... and you say you do... you could very well cause more danger for him by alerting someone else to the situation and allowing your husband, who has now traveled outside his comfort zone to meet her, to walk into a situation that he may not be aware of. I can understand being protective of him and attempting to alert him. What makes you think that calling her husband is going to benefit your husband... please explain.

Not trying to benefit him at all. He wouldn't even look at the evidence I found- like I said, he believes everything she says and doesn't think she's lying -

I understand what your saying and thinking I better wait until he returns home, by then I'll be moved out of the house and maybe he'll relize what I'm trying to tell him. I don't know... thank you for listening to my problems. My friends and family are very supportive and tell me I;m better off without him and I should've left him the first time, but I think everyone deserves a second chance and now his chances are gone. Their could never be trust in the relationship again. It will only be a matter of time before he calls me and wants to make amends but by that time it will be to late.