The nervous smile upon his face betrayed the gravity of his revelation.

His wan smile betrayed the hint of an impulse to argue with her, to claim failure yet again.

For the smile had betrayed the identity of the man who lived in the cabin.

His pleasant smile and gently clasped fingers betrayed nothing but polite interest in the ritual.

Only a slight smile betrayed the pleasure he felt as he walked out of the house.

Her smile betrayed only a faint decrease in wattage.

He waved off her comment, but his smile betrayed how much it had pleased him.

He pretended to be offended by her remark; however, his smile betrayed this effort.

Her smile, on and off camera, betrayed no anxiety.

And perhaps that smile now curving Lady Lana's lips betrayed certain knowledge kept secret from me!