He had never been told the reason his research was so important to her.

If you'd like to tell me the real reason we're talking, maybe then we can help each other out.

No way was she going to tell him the real reason.

Even now, he could not tell them the real reason.

"You will get one more chance to tell me the reason."

But he could not tell them the true reason for going there.

Nor could he have told the reason for his next action.

But I didn't want to tell him all my reasons.

He couldn't bring himself to tell his friend the reason for the trip.

"But I want you to tell me the real reason."