Her mouth twisted and she turned to look at him.

The woman's mouth twisted as though in pain and she closed her eyes.

Her mouth twisting, she suddenly knew exactly what that something else was.

His mouth twisted as if he were about to laugh.

His mouth twisting with anger, he called out a single name.

He looked surprised, then his mouth twisted in a smile.

The red mouth twisted, and tears filled the blue eyes.

He tried to sit up, fell back, his mouth twisting in pain.

His mouth twisted into a smile as he stared at the floor.

I could tell from the way his mouth twisted that movement was painful.