Ruby, did you actually APOLOGIZE to her for your rudeness, or did you later simply tell her that you didn't realize you were being rude? There's a BIG difference in the two scenarios.

IF you owned up to your actions AND apologized to her, there's no reason for her to hold a grudge. But if you NEVER actually owned up to what you said, took responsibility for it and directly stated to her "I apologize for being rude, I didn't mean it", then she has a right to still be annoyed with you.