When Oleg Kashin, a journalist who was once close to the Navalnys, alleged that Navalnaya’s father was actually an FSB agent living in London, Navalny refuted the theory: Her father had never worked for the security services. Moreover, he was not currently working for the FSB in London because he had died in 1996; here was his death certificate. Kashin, who admits that the incident was “an embarrassing failure,” told me, “I have apologized several times, but I don’t think these apologies are welcome.” Like many people I spoke to, Kashin believes Navalnaya is the source of Navalny’s conflicts with others in the Russian opposition. (Ashurkov confirmed this. “She’s likely to judge these kinds of people more harshly,” he said, adding that Venediktov also falls into this category.)
https://www.vanityfair.com/news/2021/07/how-yulia-navalnaya-became-russias-real-first-lady