Have you even checked the letter? Between the very specific DNW, the prompt itself, and their note on dub-con/non-con (which is also listed in their likes) it is very clear.
That note, for anyone not looking at the letter:
"**Note on Dub-Con/Non-Con: Most of the time I’m really enthusiastically into dub-con/non-con and the resultant trauma and aftermath of it, but there's a number of requests for this exchange where I'd rather it not be a thing. In an earlier version of this letter, I had canon-specific DNWs indicating that I wasn't up for it in a number of ships, but I've since realized that a general "DNW: dub-con/non-con where a woman is the victim" pretty much covers it and streamlines things a bit."
Re: Chocolate Box - Letter Discussion
That note, for anyone not looking at the letter:
"**Note on Dub-Con/Non-Con: Most of the time I’m really enthusiastically into dub-con/non-con and the resultant trauma and aftermath of it, but there's a number of requests for this exchange where I'd rather it not be a thing. In an earlier version of this letter, I had canon-specific DNWs indicating that I wasn't up for it in a number of ships, but I've since realized that a general "DNW: dub-con/non-con where a woman is the victim" pretty much covers it and streamlines things a bit."