She can always sue you. However, it will be her word against yours. How would you know any current damage on the vehicle was not sustained after you had collided with her? Consult a lawyer. Don't post any further admissions on here.
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She can only file MV charges against you for 30 days. She can sue you for 2 years. I do not know who was at fault but it sounds like that is an issue. I would advise your insurance company of a potential claim since they may decline coverage if you do not advise them within the time established in your policy. You should speak to a civil law attorney not a criminal law attorney on this.
For negligence claims, she has two years from the date of the incident to file a complaint against you. For motor vehicle violations, she has 30 days to file. Please consult with an attorney.
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