When I looked up again he was standing right over me, the faint grin widened.

By this time the grin had widened into a full smile.

Then, as he looked at the door behind the man in black, his grin widened.

She didn't say anything, but his grin widened just the same.

She knew who I meant, of course, and her grin widened.

When she sent him an arch look, his grin only widened.

Still she didn't fire, but her grin widened until it was almost a laugh.

The grin widened as he considered doing a little investigation of his own.

The grin widened, but the face was bleak as ever.

Her grin suddenly widened and she ducked back into the kitchen.