She told a white lie out of necessity.
- Aus Verlegenheit erzählte sie eine Notlüge.
What she told me yesterday is a white lie.
- Was sie mir gestern gesagt hat, war 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.