The fact that there are no dishes to wash is a bonus for her. Pizza is the hard currency of our relationship with these children. We can trade the promise of a Domino's pizza for their cooperation in everything from housework to homework. Pizza is how we get out of mealtime jams created by their busy lives. Pizza is how we make a shopping trip special when the purchases will not be for them.
Pizza lubricates the social life of adults, too.
You can serve your guests any fancy meal you want because you can always order pizza for the kids. Order pizza for the kids. Pizza is our excuse to get together as a family. Even teens will agree to be seen with their parents in public if the family is going out for pizza. Dinner out with the family isn't ruinously expensive, because you are only having pizza.