Okay, on the episode "Rush to Judgement" where Lucy assumes that Coach Koper is hitting on Mary why does she get in trouble? Mary, Lucy, Matt and the coach are sent to the principals office to discuss what Lucy saw and the principal said she wouldn't get in trouble. After everyone else leaves, the principal tells Lucy she has to call one of her parents about it. Why would Lucy get in trouble for assuming something for her sister's protection? and why would the principal lie to her?

Wasn't it that Lucy was taking headache meds at school?

No I am talking about another episode. She got in trouble in that one too yes, but the one I am talking about was just on yesterday.

I have no clue that is a great question though I wonder why she got in trouble for trying to protect Mary.