Similary, April doesn't really want to admit that in almost every respect, she's functionally identical to Becky. Both of them have messed up families that only pay attention to them when they do something to annoy them, both of them are superficial and dim and both of them hate each other because they get in each other's way. What this tells me is that Patterson women are at pains to avoid admitting that they're pretty much the same person as the enemies they've made.
We see this proven when one idiot who pretty much fucked herself over trying to please worthless parents who'll always prefer a child who can manufacture more children with Daddy's last name to the one that's killing herself to prove herself turns around and has the temerity to pity and hate the woman whose life she ruined by being a clingy irritant who doesn't respect boundaries that make her feel bad about herself. In almost every respect save one, Lizardbreath and Thérèse are the same person; what differentiates them is that eventually, the evil career woman will clue in and realize that making a fool of herself trying to prove herself to a boor father and idiot mother is a sucker's game. Liz isn't gonna do that because she's a moron.