She's going to hit us with the "I-got-it-worse-than-you" bullshit.
Panel 1: We see Lizzie laugh at Mike who's playing Cheeta the Chimp. Harmless, right? Since they're getting along for once, maybe even to be encouraged, wouldn't you say? Not according to Elly. The look on her face is one of surprised consternation.
Panel 2: The children insist on being children, damn them, when John arrives talking about how hard his lot is.
Panel 3: We see the two of them startled by Mike yell really loud. This shocks them because of their mutual belief that he should spend his time with his hands folded waiting to be given permission to speak.
Panel 4: She then makes a snarky remark about trading places because dealing with children is soooooooooooo hard.
Summary: Elly failed as a mother because she thought she was too special to have to deal with children.