Firstly, I want to blow my own trumpet a bit: Almost from the start, I speculated that Tilly's 'job' with Hannelore was a 'favour' Beatrice was doing for Tilly's father, who had some kind of power over her (at least to inconvenience her if nothing else).
Now, I can't help but wonder where Jeph has decided to take this. Naturally, Hannelore is going to confront her mother but to what end? The possibilities are near endless. Examples range from Hannelore cutting off all contact with Beatrice (preferring to do without her allowance from her rather than be involved in her plots) up to her deciding that her mother needs to removed from her position for the greater good (which may lead to her doing a Deal with the Devil, or at least Spookybot). She will also almost certainly take in Tilly as a sort of refugee and we will see Tilly get a job of some sort in Northampton.
The possibility of Hannelore launching a coup attempt against her mother is far less likely as it would effectively be writing Hannelore out of the story. However, I do expect this arc to have long-term consequences, especially given Hannelore's stated desire to do more with her fame, position and heritage. It is even possible that she may be unknowingly playing her role in a drama that began before her birth.