It's like telling the truth on the stand is for other people... it doesn't apply to her.
Has Ava done horrible things... dang yeah. But did she cause Irene's death, nope. That was a total accident. And one that never would have happened had Kristina not gone to see Ava... Why not blame Sonny... if he had not viciously attacked Dex she Ava would have had no reason to subpoena Kristina to testify... or if he had never sued for full custody of A very in the first place... But she can never blame him he is her greatest enabler.
Lying about the fall and the baby dying to get Ava punished for past misdeeds is wrong. You would think that Alexis and/or Molly as lawyers would point that out to the brat.