It was all right, he said, with a sly grin.

A sly grin will be considered the same as smiling.

She turned from Charlotte and sat down, giving him a private sly grin.

A sly grin was on his face as he followed.

One look at his sly grin gave Tom a clue.

Jim had asked, with a sly grin at the astronomer.

But this time he swallowed and gave her a sly grin.

There was a sly grin on his face as he seized both children by the hand.

"I would wish my job on no one," he said with a sly grin.

"This is something for the trip back," he said with a sly grin.