That was an interesting article. What complicated family relationships these people had! That article didn’t mention that Georgiana Duchess’s daughter Harriot married
Lord Grey, the father of her half-sister Eliza. It also didn’t mention that the Devonshire menage included the Duke’s daughter by a paramour, who was brought up by Georgiana with her own children.
Their house was gorgeous, but what a mess! (And of course, no flush toilets ...)