I'm a married man and recent exchanged emails with a woman on a dating site. We met for dinner last night and I had second thoughts and after dinner

Sounds like a classic case of blackmail, which in Virginia is a Class 5 felony.  If you decide to press charges, contact your local magistrate's office to do so.  If you are looking for a civil remedy, it may be possible to sue her for harassment.  Courts will not ordinarily issue injunctions to stop her from speaking to your wife, since the First Amendment right of freedom of speech is very strong, but it's possible you could get a restraining order for her to leave you alone, since she is committing a crime.  This answer is given in accordance with the laws of Virginia and may not be applicable in any other state.  It should not be construed as legal advice, as that would require a more thorough analysis of all of the facts involved in a specific case.  If you need further information or assistance, please feel free to contact my office for a consultation. Case results depend upon a variety of factors unique to each case. Case results do not guarantee or predict a similar result in any future case.