She could not help smiling to herself at the thought.

He smiled at the thought and kept on walking home.

He could smile at the thought of his next race.

He got into his bed, still smiling at the thought.

I had known them now for some time and smiled at the thought of their good company.

I couldn't help but smile at the thought: It had been a great day.

She even managed to smile a little at the thought.

He smiled at the thought of them going through life as a couple.

But she found herself smiling at the thought of him.

His news would keep - and, as always, he smiled at the thought.