What she told me yesterday is a white lie.
- Was sie mir gestern gesagt hat, war eine Notlüge.
She told a white lie out of necessity.
- Aus Verlegenheit erzählte sie eine Notlüge.
An occasional little white lie such as Weston's probably won't cause any lasting damage. And at times, telling the truth—particularly the whole truth to a child who's not at an age to handle it—may do more harm than good, they say.