Dakota Johnson, left, and Jamie Dornan in Fifty Shades of Grey
Focus Pictures
April 22, 2015

Fifty Shades of Grey author E.L. James has enlisted her husband to write the script for the film based on her book’s sequel, Fifty Shades Darker, reports the Hollywood Reporter.

Niall Leonard, who has two sons with James, is an author and a screenwriter and worked on the first Fifty Shades film, though he was not credited.

E.L. James earned a reputation for demanding total control over her material during the filming of the first movie in the trilogy. She reportedly clashed with director Sam Taylor-Johnson over the adaptation. Neither Taylor-Johnson, nor screenwriter Kelly Marcel, will return to the franchise for the second film.

Though the first installment in the Fifty Shades series grossed $568.8 million at the global box office, plans for the sequel have stalled. The departure of Taylor-Johnson sent the studio scrambling for a replacement, and stars Dakota Johnson and Jamie Dornan are reportedly both negotiating for more money.

Read next: Fifty Shades of Grey Director Didn’t Enjoy Working With Book’s Author


Write to Eliana Dockterman at eliana.dockterman@time.com.

Read More From TIME