Gustave has taken it upon himself to observe Marion and Sanglain following the death of the Princess and DT.   But KT thinks Gustave is in the city of Marquesas for other reasons. 
You really think we 
can trust that woman?
¿De veras crees que podemos 
confiar en esa mujer?
¿De veras crees que podemos 
confiar en esa mujer?
Acha mesmo que podemos
confiar naquela mulher?