Mother's Mother looked angry for a moment, but then her expression softened.
She raised her eyes, seeing how his expression had softened.
Rolls' expression softened to see the pain in the woman's eyes.
Her expression softened at whatever she saw on his face.
His expression softened and he put an arm around her shoulders.
He watched the boy for a while, and finally his expression softened.
He was no longer shouting, and his whole expression had softened.
But her expression softened and she asked, "Do you really think we could reach the top?"
His expression softened into what could almost be considered affection.
His expression softened at what he must have seen in her face.