Tom: How's it going?
Cinthia: Not good.
Tom: Why is it so?
Cinthia: I'm grounded. My mom doesn't let me go out.
Tom: What did you do?
Cinthia: I was supposed to take care of my sister when she was out.  
Tom: And?
Cinthia: I hate doing such things! 
Tom: And where was she?
Cinthia: Preparing the garden for the party. Today there'll come our family and I was supposed to entertain the little brat.
Tom: What happend?
Cinthia: Well, she got burned with the milk. I was watching TV.
Tom: I'm sorry, is she OK now?
Cinthia: Why do you feel sorry for her and not for me? 
Cinthia is grounded for not taking care of her younger sister properly. Cinthia's sister got burned while Cinthia was watching TV. Tom feels sorry for Cinthia's sister but Cinthia feels sorry for herself. 