Big bottle of money
Get a large jar or jug (an empty water cooler bottle for example), label it with something the two of you want to get, or do, or a place you want to go, and start putting your change into it. Add small bills from time to time as well.
If you really want to bless her, start skipping some regular treat and put the money you would spend on the treat into the bottle. Get a “plain coffee” instead of a fancy one, get water instead of a soda or other drink when you eat out, and so on.