What is Kate doing?

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It's Sunday afternoon. The Turners are at home and it is raining. Mr Turner and his son are in the living-room. Mr Turner is reading and Dave is doing his homework and watching television at the same time!

Mrs Turner : Jack, where is Kate?
Mr Turner : I don't know. She is very quiet. Maybe she is working in her bedroom.
Mrs Turner : Dave, what is your sister doing?
Dave : I don't know, maybe she is sleeping, or listening to the radio
Mrs Turner : Kate, are you working?
Kate : No, Mum. I'm in the bathroom.
Mrs Turner : What are you doing in the bathroom at three o'clock?
Kate : I'm cleaning the dog in the bath.
Mrs Turner : Oh dear! Open the door, Kate!!! Open!