Yun Qingshu didn't immediately leave the Tianchen World, primarily because of Lu Chen; she was eager to uncover any secrets Lu Chen might still be hiding, especially since he even knew about her origins from the Ancient Era.
Although Yun Qingshu was somewhat repelled by the events involving Lu Chen and Yun Xianxian, she had decided to tolerate them and allow this other self, Yun Xianxian, to be with Lu Chen.
Moreover, since Yun Xianxian's purity had already been compromised, she couldn't just take her back and merge with her.
If she merged with Yun Xianxian, wouldn't that mean she too would have been defiled by Lu Chen?
Even though indulging Lu Chen and Yun Xianxian would affect her main body, like sensing their intimacy, she would find a way to eliminate these impacts over time.
As long as she advanced further in her Realm, she would find a solution to this issue. In the meantime, she had instructed Yun Xianxian to avoid doing certain things with Lu Chen.
