I can only imagine how it must feel to be married but yet be alone because your spouse is far away. I would suggest that your friend might want to slow things down with her companion, There would be nothing wrong with stepping back and sorting things out. If he is always around giving her comfort and attention, I don't think she can make a clear decision on how she feels. Either way it sounds like at this point someone is going to get hurt and that is never something most people want to deal with. As her friend offer her your support, give her some attention that she might be lacking and hopefully she will figure out what she should do.