This need to banish the crowds of people who clearly still want to destroy her no matter what her stupid parents who weren't there and lying former friends might say doesn't just stop at chasing children out of the house. As we've seen over and over again, there's a bouncer in Elly's skull that tells the question "Where are the kids?" that it's not welcome in her mind. Simply put, the terror of large assemblages of people is so bad, she won't even let herself think about the kids once they've been sent away.
Sure, people might whisper behind her back about what a lazy, selfish, negligent parent she is and how she seems to be spoiling for a fight with her children but they don't have a screaming child inside their skulls telling her that mobs are trying to kill her while her parents tell her to lay down and take it. Given this distrust of others, it's sort of easy to see why Elly is sort of a mess. About the only thing she thinks she agrees with Marian on is that her old habit of saying that certain foods taste bad was because she was naughty. Neither she nor her imbecile mother realize that getting a rugby ball to the nose kinda ruined her ability to taste food. Since she might as well be eating styrofoam, she can't understand why her children object to sludge she can't know tastes terrible.