Beauty Lian truly was a schemer with profound tactics; she knew that even if she made a move now, it wouldn't significantly harm a Noble Consort. Thus, did she intend to set the stage first and then seize the opportunity to deal with her, eliminating her altogether?
Indeed, if she had such an opportunity, she would do the same, regardless of innocence. If it were her, she would certainly pin crimes on everyone and catch them all in one swoop.
Her cousin had done many things for her and the Xue family over the years; withdrawing cleanly and completely would be difficult.
Moreover, the Guo family was her mother's maternal home, her mother's reliance, and also her support. Her cousin relied on her power, while she used her cousin's wealth, both proving useful when needed.
If the Guo family encountered trouble, her mother would not stand by idly; she would assuredly find a way to enter the palace and seek her help, and then it would be up to her to help or not.