In the High chaos version of Kingsparrow Isle, Lord Pendleton mentions a "cousin Cecelia" who will inherit the Pendleton fortune now that all the family are dead. (Or presumed dead). I believe that early on in the game, Cecelia admits that she used to own an apartment in the Flooded District. Living in the Flooded Distrcit would cost a ridiculously large amount of money, even for a small home.
Can we assume that the Cecelia who escapes at the end of The Loyalists is the cousin that Pendleton refers to?