I can't think of a title (QAQ)

Nayeli suddenly knew that their plan had been revealed but how was that possible? Sign language on their planet alone had twenty different kinds and the entire Republic had over a hundred so how could this person understand everything they said? She realised then that they had seriously underestimated this person.

"You know?" she asked with slight panic in her eyes.

Zi Han rested his fingers on his forehead and replied simply, "En."

Nathan felt anxious thus he tugged at his sister's sleeve and mouthed, "Sister, what do we do?"

Nayeli bit her lip and glanced at the vast desert caught between a rock and a hard place. For a long time, she didn't speak making Nathan flustered.

Zi Han didn't say anything. He waited patiently for her to speak. After ten minutes she finally stopped the hovercraft landing it on a tall sand dune and pushing the hangar door open.