He looked at all of us and his mouth quivered.

She looked down, then up again, and her mouth quivered.

From the way her mouth was quivering he knew there would be tears.

He stared at the woman walking toward him, and his mouth quivered.

She picked up the parcel, her mouth quivering, and turned to go.

"Then you know what I expect," she continued, her mouth quivering with amusement.

His mouth was quivering and his eyes were too big.

Her mouth quivered, then tightened up hard into a little knot.

The captain's mouth quivered with the effort to suppress a laugh.

"It feels old," she told him, and her mouth quivered.