Queen Lillian was clueless as to whether or not the Demoness that she had summoned had killed that evil spirit or not. She wanted to be sure about that but she could not dare to summon Lilith again to confirm it.
Lilith had clearly mentioned that she would kill Lillian if she tried to summon her again. And she also knew that her magic was not enough to bind the Demoness inside the magic circle.
So now, all she could do was hope that the Demoness had finished the spirit. Judging by the way the Demoness was talking about that spirit haunting her as well, not just for a decade but for tens of thousands of years, she wanted to believe that now one of her many problems was over.
Now, she wanted to focus on strengthening her black magic so that she would be powerful enough to bind even the most powerful Demons in her magic circle. There was no use of being able to summon them if one was unable to control them.