Hi nic
Sorry to hear about your situation.
How does your wife feel about this, does she agree with what you are saying but is scared of the consquences or is it that she is still a firm believer?
I think the best thing you can do, if she is still convinced of the truth is to introduce ideas to her very gently and not to bombard everything on her at once.
As has already been suggested, make time for yourselves doing something you will both enjoy, and that will bring to closer together. I think this is where Simon and myself went wrong, all we seemed to do was agrue about the 'truth' for months.
As Red says only you know what will work best for you and your family. But remember that there will always be people hear to listen to you and support you through everything.
If you want to e-mail me, my address is in my profile.