Volca got into the Celestial palace. She had a plan. And she wanted to realise it. The plan was to get close with Emperor Tai, find out why her mother was close with him, had even closer ties to the the point that he did not touch the two of them when they harmed the heavenly princes and princesses. She wanted to know if her intuitions and suspicions are right. She couldn't understand why her mother hid so much about her life to Volca. Hence without having another choice, Volca formulated this plan. She told nobody about it. The second plan was no matter what, Emperor Tai is the hindrance to her King Huo'er's life, hence she did not want the Emperor to live any longer. She wished to find out the truth behind all the rumours she has been hearing about about the mass death and murders, the curfew and the newly imposed strict laws in the Celestial Palace.
Volca did not tell these matters to Huo. But lied and escaped from his clutches for the time being.