You are so smart! Take care of Mom, and the vacation will take care of you!
The easy (and perfectly tailored) answer is the Child Activity Centers in the Disney resorts. These would give you both a great chance to have some time to yourselves for dinner, and maybe to enjoy the parks without kids?
These supervised activity centers, like the
Neverland Club at the Polynesian, take children aged 4 to 12. Kids are in these centers doing crafts, games, and other fun recreation. They also get served dinner and snacks.
There are several available. I would be glad to recommend one based on where you are staying, or suggest that the Neverland Club is certainly a great choice. Note that you do not have to be a guest of a particular resort to send your kids there.
If this is not exactly what you meant by your question, please visit my bio page and let me know what you had in mind. I would be glad to take another stab at answering your question, or to make suggestions for that special evening you would like to plan!
Have a magical vacation!