It is wrong to yell at people.
Lucy's sister keeps talking her makeup and using it all.
Lucy wants to let her sister know that she doesn't like it when her sister takes her stuff.
Lucy sits her sister down and asks her to please not take her belongings.
Lucy tells her sister loudly and angrily to stay away from her belongs.
Lucy's sister agrees to try not to take her things any more.
Lucy gets into a heated fight with her sister and their relationship suffers.