Mischievously

Mary could generally tell when Tom was lying, because he couldn't help but grin mischievously.

Tom smiled mischievously.

Mary smiled mischievously.

He smiled mischievously.

Stop smiling so mischievously.

She winked mischievously.

Tom winked mischievously.

When the coarse sieve laughs at the fine sieve, the sheepskin rug smiles mischievously.

The coarse sieve mocks the fine sieve, while the sheepskin rug smiles mischievously.

They giggled mischievously as they plotted their prank.