You don't necessarily need to void the deed or go after the current owner (which would be difficult unless they were involved in or knew about the fraud), but you could just sue her for fraud, assuming the statute of limitations has not expired by now.
When did this fraud happen, specifically how did she trick you, and when did you discover the fraud?
This is NOT legal advice, just a general discussion of the law, as we are not familiar with the specific documents and facts of your case, etc. Please consult with a competent attorney in this area of the law for specific legal advice regarding your particular case, as the advice may vary depending on the facts.
You seem very squeamish about providing factual detail. I suggest you get a consultation in private with an attorney that you feel comfortable speaking with.
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