They even published that Evelyn's death was suicide.
They said it was because Chester discovered that she was pregnant with their child and was about to abort it again.
He asked her to part with her lover and give birth to their child for an heir. Yet, they said Evelyn chose to die instead.
Fatima seemed determined to completely ruin Evelyn's image among the people of Zygos.
It was probably a ploy to completely crush the Leonharts so they would not be more powerful than the Ravenhills again.
Fatima must have also been annoyed that Evelyn was still known as the fairest lady to ever grace Zygos.
Because people still had good memories of Evelyn, it made her seem like a better Queen than Fatima, so it must have been like a huge insult to her pride.
Likewise, Fatima's insecurities had gone too deep and turned into a strong hatred to the point it almost seemed like an obsession.
