His lower lip began to shake and he bit down on it.

I had seen his lips begin to form a phrase.

And you know, my lips were beginning to get those lines.

His lips began to curve with the image of that.

His lips began to work, but no sound came out.

Then, after a moment, his lips began to curve into a smile.

His lips began shifting in a way that she had never seen before.

Her lips began to move as she mumbled to herself.

His hands and lips began to make love to her.

His lips began a chant that the others took up.