Baelari was born with a platinum spoon. Eldest and only daughter of one of the most noble lineages, she did not train as a Sith, but as a singer. When she was twenty four, she was wedded to the Emperor, and produced his heir only a year later.
Outwardly, Baelari was a model Empress, but unbeknownst to the public, her resentment toward the Emperor only grew as the years passed. 12 years after she was wedded to him and eleven years after she gave birth to Zhaka, she snapped. She faked a stillbirth, smuggled her youngest out of the palace, and then invited her recently-apprenticed firstborn home. That night, she tried to kill him. And she failed.
Baelari's death was deserved. She had failed as a mother three times over, failed to kill a child half her size, failed to build a life she could even pretend to be proud of. But death is a foreign subject to Pureblood Sith, and, even without a physical form, she is far from done trying.