Rebecca completely put Hewitt's matter out of her mind.
Even if he knew her so-called secret, it was probably normal for a "demon hunter" like him to kill a few bandits, not to mention, even if he exposed it, it wouldn't pose any threat to her.
Ever since meeting Hewitt, she had been feeling waves of irritation in her heart from time to time. Although she used the fact that seeing Hewitt reminded her of Ogden as a reason in front of Nellie, she chose this "excuse" because it indeed was a gap in her heart.
She still felt pain.
Hewitt's revelation of her actions caused momentary fear in Rebecca, which quickly turned into anger.
Clearly, the small-town hunter noticed there was a problem with her attitude, so he deliberately brought up the matter as a warning to her.
And when he initially gave her the axe, he must have had ill-intentions, as it surely had some surveillance function. Otherwise, how would he know what she had done?