Lawyers for Meghan, Duchess of Sussex, made a court filing on June 30 following a request from the Mail on Sunday for further information. Their legal response (which the Mail published parts of today) aims to provide evidence to disprove core claims made in Associated's case. 
The response also aims to undermine the Mail’s defence that Meghan arranged for friends to speak to People about her letter to her father (and, therefore, was not entitled to privacy). The docs explain in detail that she did not know about or have anything to do with the article.
Across 31 pages, Meghan's lawyers go on to respond to dozens of questions from Associated's legal team, including a request to explain why she was "vulnerable" at the time of the Mail printing the letter ("in addition," they write, "to being heavily pregnant"). Answer below:
A source close to the Sussexes explains that this is the Mail on Sunday's third request for further information: "[The paper] has continued to make a further series of claims about The Duchess, that again, we provided evidence that dismisses these claims one by one."
