I'm very sorry to hear that Mick. I would have thought that after all of the effort you have put into the getting married, getting the visa and bringing her here to the UK, all of which are things she must have wanted also at some point, not to mention the money you have spent, that she would have given it a decent chance and at least have stayed a few months before making this decision.
I think she has been extremely selfish and very unfair to you and if I were you, I would have no more contact with her and I would put this whole sorry epsisode behind me and move on.
Iain.
