Who is Olga Sisovsky from The Prague Orgy and what is their importance?

Olga Sisovsky is a renown writer in Prague. The Czech people love her stories. She is married to Sisovsky, but she is best known for her stories and her problems with alcohol..... a problem that leads to lewd behavior. Olga is also paranoid that the authorities spying on her. Over the course on the novel, she becomes increasingly unreliable, and it's difficult to determine whether she is telling the truth or lies.... in the end, it's up to the reader to decide.