This NPR article provides some detail about her essay:
Novelist Who Penned 'How to Murder Your Husband' Essay Charged With Husband's Murder
IMO, the snippets of her essay quoted in the article don't appear as damning as I first expected, based on the headlines I've seen. It's the well worn trope of "truth is stranger than fiction" that is an internet site's clickable dream.
The "how-to's" in her essay sort of follow the basic structure of what you'd expect as the result of a writing prompt, and come across to me as more "light hearted" than indicative of murderous intent. Just MOO. IMO.
From the linked article (link above)
"As a romantic suspense writer, I spend a lot of time thinking about murder and, consequently, about police procedure," the post read. "After all, if the murder is supposed to set me free, I certainly don't want to spend any time in jail. And let me say clearly for the record, I don't like jumpsuits and orange isn't my color."
The essay described a range of possible motives for murdering a husband, ranging from avoiding the financial hit of a divorce to infidelity by a "lying, cheating







," and even the possibility that the wife is a professional contract killer.
It also weighed the pros and cons of different methods: "Guns — loud, messy, require some skill. ... Knives — really personal and close up. Blood everywhere. Eww."
She warned against committing a crime of passion: "Most of the time there is a trail that leads directly to you. Each type of murder leaves clues. A crime of passion does not look like a stranger was involved."