"I like you," he said, his thin lips flattening into an innocent smile.

Her lips flattened again in pain and she shook her head.

His mouth was a tight snarl, lips flattened against his teeth.

Her lips flattened as she stared back at him.

Her lips flattened, then twisted up at the corners, a pale reminder of the joyful girl I'd known so long ago.

Jim sat back, lips flattened into a thin line.

Skow's thin lips flattened into something like a smile.

Max's lips flattened when she retreated, keeping well out of his reach as he moved to the table to pick up the key.

Max's lips flattened, then he, too, began to smile.

His lips pursed and flattened in a sort of exercise to work the feeling back into them.