Mass is an essential quality of matter, so the two are very related. Perhaps a good analogy is to food and calories. All food has calories like all mater has mass. Like mass, the amount of calories a food has depends on the type and quantity of food.
An important piece of information for us to know is how old is your daughter? The answers you may get would be very different if she turned out to be 6 compared to 16 for example.