He tried to maintain a professional distance from Jess, but his emotions betrayed him.

Largo sees this scenario as proof of how emotions betray people.

On Neotrantor, my own foolish emotions betrayed me again.

Dantes did not answer; he feared that the emotion of his voice would betray him.

Alia's face was composed; no emotion betrayed itself as her gaze caught and held her mother's.

He spoke about how his emotions sometimes betray him, and how movies can lie.

But the sudden emotion in her voice betrayed her.

He knows Ryalth must have had a reason, a reason well beyond sentiment, for though she has feelings, those emotions will not betray her.

Then he vowed that never again would his emotions betray him.

Seeing his emotions betrayed only seemed to make the human madder.