Good job! Let her know that you will fight for the marriage and won't just roll over and play dead.

Now her story is changing - just when she told you the details of the affair in confidence and you were rebuilding the marriage?????? That's a new one. But I'm thinking that is very good. Sounds like she may be rewriting the history of the affair.

Continue what you are doing. It is going well. Let her know that you are working with her on the dog, her clothes, books, whatever. Don't try to make sense of her babbling because it will just wear out your brain.

All in all very hopeful.