How disappointing if they DO turn out to be dressmakers ...

Actually I suppose doing actual dressmaking but having to turn to the oldest profession as well may have gone hand in hand.
I noted that Elizabeth Braham wasn't an actual Madam. She didn't run a brothel but rented out rooms to prostitutes.
It may be it was her son Lewis or Louis who crossed the line trying to run matters. The court case evidence sounded very odd, especially as a wife was also involved. Maybe a business arrangement gone wrong presented as something else?
As Alex hinted with her final newspaper reference, it seems quite a nexus or perhaps a profitable circle - the courts, lawyers and judges got fines, the "lodging houses" with the ladies' clientele continued, it made juicy tidbits for the printers and newspapers and ad infinitum ...