@riflow
To my understanding the queen obviously has no feelings toward her husband. She had the 2nd daughter with a lover. That's why she loves Tiara, and why she doesn't care about Pryde. And why the father of Pryde spoils her so much, trying to make up for the lack of motherly love.
And original's Pryde actions are also in response to those circumstances. Pryde is jealous of Stayle's mother and their love, so she does everything to destroy it. As in "if I don't have it - no one should". So she orders him to kill her. This act of 'killing your own mother' also reflects her own desire to kill/harm her own mother for not loving her as a kind of reenacting.
Also her behaviour bases more on the mother's hatred, than on father's spoiling - spoiled childern are egoistic, but showing aggressive behaviour is further apart.
Of course she has psychopatic tendencies whitout question, but these behaviours are heavily influenced by the environment and are not counteracted.