We recently set up a trust, so she is pretty protected anyway

That's the point. My husband handles the checkbook because when I tried a made a mess of it. But we both know where the money is and we are both beneficiaries on our retirement accounts. Everything is jointly owned. That makes us both safe.

I always try to keep her involved and let her know what is happening

Yes! And I'm sure if you are making a big move, you will ask her...like, I'm buying a house, or I'm buying a car, or I'm investing our retirement savings in the stock market instead of bonds (an example).

Still, we never made a significant financial decision in this house that was individually decided. We always agreed and always both had an equal stake.

I wouldn't be able to turn my finances over to any one. I think you can appreciate why, given what I just wrote in this blog :)