It has Sovietshu's mother the one that made the cookies. They were supossed to be given to the mistress so she became infertile.
Sovietshu saw the cookies, shared them with Navier not knowing what they had. Once it was discovered what they really were, he saw the opportunity to get rid of the mistress and accused her to protect his mother.
Now is the mistress' son taking revenge for the betrayal of his mother.
So the only time that Sovietshu protected a Queen, it was his mother, and when he had the chance to prove that he was better than his father, he took a mistress himself and dethroned the Queen, his wife.
Blood is thicker than water, at the end of the day...
Ohhh okay but like still, Ergy was born because the mother went on to newer better things. He even said himself that his dad was the best thing that ever happened to her ┑( ̄Д  ̄)┍ like i get it but it's just weak. A really really weak reason for the revenge. A lot of what happened to Trashta was because Duke Ergy egg her on too. The amount of people who died and lost their life cos his mother decided to play stupid games and taunt a child that " she would give birth to a brother would be fertile" ...
So he was avenging his mother for a crime she committed?