How does Dr Omayra Torres deceive the other members of the group in City of the Beasts?

In "City of the Beasts" by Isabel Allende, Dr. Omayra Torres deceives the other members of the group by pretending to be a nurse and gaining their trust. She later reveals her true identity as a scientist studying the mysterious Beast they encounter in the Amazon. Her deception is meant to ensure she can carry out her research without interference or scrutiny from the group.