I did some research into defamation and found this:
"1. False Statement of Fact
Truth is an absolute defense to a claim for defamation. No one can prevent you from telling the truth, even if that truth harms someone else. Further, the statement of an opinion generally will not constitute defamation, since it is not offered as a statement of fact. For example, if a food critic states that a restaurant serves horrible food, that is not defamation since taste will always be an opinion. Even if the restaurant brought 100 witnesses to court to attest that the food is wonderful, the critic is still entitled to his opinion.
On the other hand, some believe that they can escape liability by casting a fact as an opinion. A number of clients have come to us for a second opinion after another attorney has told them a statement is not defamatory because it was stated as an opinion.
Adding the word "opinion" to a defamatory statement does not automatically shield the speaker from liability. The determining factor is whether the "opinion" is about a verifiable fact. For example, as stated above, a food critic is protected when he offers his opinion about the food, but if he says, "in my opinion the food was horrible and the restaurant has rats," the statement about rats is defamation (assuming it is false) because it is a verifiable fact. Similarly, "in my opinion, he cheats on his taxes" is a defamatory statement since it is the assertion of a fact, even though it is called an opinion.
Context is everything in determining whether the speaker was offering the statement as a verifiable fact. We once received a call from someone who was checking out at a local supermarket, and tried to pay with a Discover card. The cashier said the store didn't accept that credit card, and when the customer said he had always paid with his Discover card, the cashier rudely responded, "You're crazy; I've been here ten years and we have never taken Discover cards." The thin-skinned caller wanted to sue for defamation because she had accused him of being crazy in front of the other people in line. Clearly the statement was not intended as a verifiable fact. The cashier was not saying, "you are suffering from a mental illness that would be verified by an examination from an appropriate mental health professional." She was just expressing in a colorful, albeit rude, manner that he was mistaken about the Discover cards.
In determining whether a statement is true or false, you must also examine how the statement is made. If a newspaper reports that Joe Dokes was arrested and charged with murder, and it is later determined that Joe Dokes was innocent, that does not mean that the newspaper is now liable for defamation. What the newspaper reported was absolutely true -- he was arrested and charged with murder.
Similarly, the statement must be viewed in context. Upon learning that you and your spouse make it a point to go on a "date night" every week, Dr. Laura calls you "bad parents" on the radio because she feels that parents should never leave their children with a babysitter. You could not sue for defamation, because she is entitled to believe and say that such conduct constitutes bad parenting. In one Internet defamation case, a court held that calling someone a liar was not defamatory when the circumstances made clear that the speaker did not have sufficient facts to reach that conclusion."
"Your reputation is priceless
Whether you respond with just a letter or go to a full blown lawsuit, you should never allow a defamatory statement to go unchallenged. Silence is perceived as acceptance. If you did nothing about what was being said about you, it must be true. The goal in a defamation action can be to recover damages, but often that is not the primary goal.
The priceless value of a defamation action is to gain back your reputation. When someone says to you, "but didn't I hear or read somewhere that you [fill in the blank]?", you can answer, "yes, someone was spreading that lie, but I sued him and he was found liable for defamation and had to pay me damages."
http://www.toplawfirm.com/whatisdefamation.html
~~~~~
Therefore, I think a strong defamation case can be made if all statements made by Dina were taken in their totality, and thoroughly assessed with the above legal criteria in mind.