I can just see her sitting there between her sons, grinning stupidly and saying, "How nice."

Alvin raised an eyebrow at him and Mike grinned stupidly.

He grinned stupidly in a way she found surprisingly charming.

Finally, as he was ten feet from the table, Lant looked up and grinned stupidly.

He continued to grin stupidly, hi 'face out of control.

She said nothing, grinning stupidly into the screen, feeling just great.

Now Helena's here as well, she's trying to talk to me but I'm grinning stupidly at her.

Suddenly he grinned stupidly and his eyes grew huge with mock surprise.

Xander grinned stupidly, as if he had been hit on the head by a baseball bat.

We all shook hands and grinned stupidly at one another.