"I want to think things over a bit first." "It's too late to think things over," he answered jealously.

"You've given me your promise.

You don't want to take it back again ?" "Perhaps, when you know everything, you'll want me to." "Tell me 'everything' now, then," he said grimly, "and you'll soon see whether I want you to or not." Nan was fighting desperately to gain time.

She needed it more than anything--time to think, time to weigh the pros and cons of the matter, time to decide.

The past was pulling at her heart-strings, filling her with a sudden terror of the promise she had just given Roger.
"I can't tell you anything now," she said rather breathlessly.