You are the original queen of The Mushroom Kingdom and the (adoptive) mother of Princess Peach.

One day, she came to you, urgent. A rather small human plumber, by the name of Mario, was brought into your kingdom, hoping to find help to save his brother Luigi from Bowser.

— being the kind queen you are, you took him in and offered all you can to help. While your strong and strong willed daughter is ready to fight Bowser to protect you, her/your toads, and your kingdom.