Suddenly he stopped and his mouth relaxed into a thin smile.

Her set mouth relaxed a trifle and she answered, "Very well.

As she looked at him, her mouth relaxed a little.

Katamay's mouth relaxed a little and let the tongue peek out.

Her mouth, full and shapely, gradually relaxed its tight line.

He blinked, startled, then the grim mouth relaxed, ever so slightly.

Then he looked across the hall, and I saw his mouth relax slightly.

The first scream came through and his mouth relaxed into a fanged smile.

His mouth relaxed, one tip inching up to grant her a point.

She tensed a little, but then her mouth relaxed under his.