Around 1900, the Errázurizes relocated to Chelsea, London. José Tomás Errázuriz fell sick with tuberculosis and spent much time in Switzerland; the couple became estranged before he died in 1927. After a six-year stay in London, Eugenia Errazuriz relocated to Biarritz. She then took up with her homosexual opium-taking nephew, Antonio de Gandarillas, known as Tony – the only child of her sister Rosa and Senator José Antonio Gandarillas Luco – and Tony's companion, an aspiring painter named Christopher Wood. Tony and Eugenia also became friends of Sergei Diaghilev and of Artur Rubinstein. Pablo Picasso adored her (she became known as "Picasso's Other Mother"); and in the summer of 1918, he and his new wife, Olga Khokhlova, spent their honeymoon in her villa near Biarritz.