You shouldn't blame people for things they didn't do.
Rosa tries to use the household computer and finds that it's broken.
Rosa wants to make sure she isn't blamed.
Rosa tells the truth that she has no idea what happened, and she just found the computer this way.
Rosa quickly blames Drew for breaking the computer before anyone can blame her.
Her parents fix the computer, and they all move on with thier lives.
Drew of course has no idea what Rosa's talking about and gets into an arguement.