There are many circumstances in business (life) where you can keep information to yourself and let the other party think what they want to think.
You justify the situation: “She never asked the right question”, or “I never actually told a lie.”
But you know in your heart, you should have told all.
You should have been 100% transparent.
You know if your heart that by not telling the whole truth, you lied.
Thats why you can’t sleep if you’re not transparent.