Also, they don't care whether they have new clothes to spill paint on. I will get them clothes when they need it.
Ellie, however, seems to be feeling a certain lack in her life, which she is trying to fill with her parents' clothes.
Some might argue that she needs pants, but apparently she feels that the shoes make the outfit. Or the tie, just to mix it up.
Margaret is remaining tactfully silent on the issue. I take this as a sign of great personal growth on the part of the Margaret.