"Quite sure."
The other seemed to feel some excuse was necessary:
"I guess I'm acting like a frightened rabbit, but I can't help it. If they caught me now they'd----" Her eyes opened wide and staring.
"DON'T!" implored Tuppence. "Lie back, and DON'T THINK. You can be quite sure that Tommy wouldn't have said it was safe if it wasn't."