Read the following text carefully. 

   It's a rainy Saturday. It's raining a lot. Mary and her family are spending the afternoon at home. Her uncles are visiting them. Mary and her father are in the living room. Mary is making a draw and her father, Mr Harris, is surfing the net. They are also talking. Mary's older brother, Peter, is playing computer games in the bedroom. His little brother, Jim, is also in the living room. He is playing with his dinosaurs collection. Sometimes he teases Mary, he is a really naughty boy.

   Mary's mother, Mrs. Harris, is preparing a snack for all of them in the kitchen. She is making some tea and talking to Mary's uncles — Lucy and Tom. They are from the nearest town and stopped by to say hello. Fluffy, the family cat, is sleeping on the kitchen's sofa. 

Mr. and Mrs. Harris are Mary's ____.