It caught me off guard or indifferent to consequences.

So I kissed her, without passion, with all regret and sadness.

She uttered a little cry that might have been mingled exultation and remorse for her victory and her broken faith.

Certainly the instant I kissed her she remembered the latter.

She trembled against me, and leaving unsaid something she had meant to say, she slipped out of my arms and ran.