The Fall of the House of Usher: What does Roderick's personal physician reveal to him?

In the first episode of "The Fall of the House of Usher" titled "A Midnight Dreary," Roderick Usher, the CEO of Fortunato Pharmaceuticals, shares his complex story with Assistant US Attorney Auguste Dupin. Roderick reveals that all of his children, both legitimate and illegitimate, have died in seemingly unrelated circumstances. He believes that their deaths are connected and blames himself for their fate.Roderick also mentions a mysterious woman wearing a bird mask, similar to those worn by plague doctors in the Middle Ages, who he has seen at his children's funerals. He wonders about her role in their deaths but does not have an answer yet. Roderick's personal physician visits him and delivers some shocking news, but the details are not revealed to the audience.The episode also highlights three main stories from Roderick's past. The first story revolves around the death of Roderick's mother, Eliza, who used to work as a secretary for the owner of Fortunato Pharmaceuticals. Roderick and his sister, Madeline, ask for help from their mother's former boss when she falls ill, but he refuses. Eliza dies, and Roderick and Madeline bury her in their backyard. However, her body mysteriously leaves the grave and kills her former employer.The second story focuses on the Usher family's crisis after learning about an informant with deep knowledge of their business. The family suspects each other, and tensions rise. In an attempt to unmask the informant, Roderick and Madeline implement non-disclosure agreements and make it clear that betrayal will result in death. They also offer a $50 million bounty to anyone who uncovers the traitor.In the third story, Roderick recalls a New Year's night from his past, where he and Madeline spent time in a bar to avoid police questioning. They meet a bartender named Verna, who seems to have an important role in their lives. Roderick sees her after speaking with his physician, and the episode hints at her connection