Raised Catholic and now creationist? Not too many decades ago that would have been odd. Unfortunately the Catholics have elected one reactionary bigot after another as Pope. The new one is possibly the worst of the two. Ratzinger is toying with intelligent design and has been for a while. He is also the one who moved all the paedophile priests around some years ago, which makes his denials of the problem nauseating.
http://www.thisislondon.co.uk/...f-child-abuse-by-priests.do
I say all this in case you want to go on the attack and try to change her religious certainty. I must also add that I think it would fail and perhaps push it to a point of no return, but personally I would be so insulted and offended by the fact that she would choose to have them educated by an institution headed by a paedophile protector and not trust me with my own children, that I might find it impossible to avoid pointing out the irony, insult and illogicality of her stupidity in no uncetain terms.
At which point the situation would be at defcon 1 about to go nuclear.
Just before I go on, one thing worries me...is this a sudden change on her part or did you genuinely not realise that these were her beliefs before? If the latter than I have to question your communications with each other.....it is the sort of thing you really should know methinks.....(no offence is intended by that).
Either way - I've given you my extreme view in order to paint a probable worst-case scenario. I am serious in that this is how I would probably feel that I had to handle it and I know that divorce would be at least even odds with that approach.
Now you have to work out where your line in the sand is and what happens if and when she steps over it....
If I am on one extreme the other would be complete compromise. You need to position yourself between those two as self-honestly as you can. What are you prepared and able to put up with and what are you not prepared to concede.
You are on your own I'm afraid, but I wish you well and hope you manage a resolution that you, she, and most of all the children can accept....
™ Version 4.2
