In 2006, Cavendish moved to Rede Record to become the protagonist of Avassaladoras, alongside Vanessa Lóes, Débora Lamm and Giselle Itié.

She began her career in local theatres, performing pieces such as A Ver Estrelas, by João Falcão, and Leve, o Próximo Nome da Terra, by Hamilton Vaz Pereira and Walter Lima Jr., and Antígona, by Moacyr Góes.

During this phase, she participated in Batom, by Ana Paula Portela and Que M... É Essa?, by Bruno Garcia and Marco Hanois, along with having made an appearance in Kuarup by Ruy Guerra in 1989.

The mini series, which starred Selton Mello and Matheus Nachtergaele, was a hit on television and, afterwards, was transformed into a film of the same name and launched nationwide the year after.

[6] In 2004, Cavendish returned to TV with a guest appearance in the telenovela Da Cor do Pecado and afterwards became part of the regular cast of Mandrake, starring Marcos Palmeira and broadcast on HBO.

[9] In 2005, her mother Sueli made, at her request, a translation of Collected Stories by Donald Margulies; for this occasion, the Brazilian version received the title "Comendo Entre as Refeições" and where Cavendish played the protagonist Lisa Morrison, and Aracy Balabanian as Ruth Steiner; the same piece had already been adapted prior as Histórias Roubadas.

With Walter Lima Júnior as director, it debuted in December of that year at the Teatro das Artes in Rio de Janeiro.

The cast included Vanessa Lóes, Débora Lamm and Giselle Itié, and was directed by Mara Mourão, as was the case with the film.

[11] The next year, she would return to play Verônica when HBO ordered the production of five new episodes of Mandrake, seeking to complete the first season broadcast in 2004[7][8] After the cancelling of Avassaladoras after just one season with Record, and the end of her marriage of 10 years to Arraes,[5] Cavendish returned to TV Globo in 2008, participating in an episode of Casos e Acasos, alongside Herson Capri, and made a special guest appearance on Ó Paí Ó as the producer Hipólita.