That being said, we all know that she expects far more of those around her than she does herself; she can lie, cheat and steal because her life was sooooooo hard, conventional morality shouldn't apply to her. Her children, on the other hand, must behave the way she was supposed to. This, I should think, is why Lynn wrote the Mike Shoplifts arc for the reason she did. As I said the other day, it doesn't take much mental effort to translate her huffy expectation that the store manager give Aaron a "lecture on honesty" to mean that Lynn expected her to angrily threaten a scared four year old with prison. When the harped-on threat failed to materialize, Lynn no doubt jabbed her finger in the air and vowed revenge for being humiliated and vowed to get history right.
There is, of course, a second, darker, strand of revisionist history to contend with. In the real world, Aaron stole that toy because he wanted it; in the strip, Mike was stealing a present for Elly. Simple as paper, Lynn thinks that if Aaron is going to steal, he should steal something for her.