The blood was slowly coming back into her lips and face.

She bit into her bottom lip so hard he expected to see blood.

She bit into her bottom lip in an effort to keep it still.

The captain bit into his lower lip for a moment.

She bit into her lower lip to keep it from trembling.

She bit into her lower lip, forcing herself to move carefully.

The Prof bit into his lip, reaching inside for what he needed.

Without regret, he tucked the last bit into his lip.

I peered out the windshield and bit into my lower lip.

She bit into her lower lip, wondering how things had managed to go so badly.