Frybabe, I've scanned that article a couple of times now, but have not found something that I read earlier about Larsson and Gabrielsson. Some article, I don't remember where, told how the two had plans to marry, but because of Larsson's writings about financial situations, they were advised, for safety reasons, to keep a low profile. So they put off their wedding plans.
Very intriguing -- her comments about "yes, he wrote the book, but it's not that simple." Did she have input? I wouldn't be surprised if she has a book in her, sometime down the road, about her life with Larsson.
I've seen the film, have not yet read the book.