Don't expect the sequel to Fifty Shades of Grey to be out by next Valentine's Day, Variety magazine says in a new report.

The report claims insiders blame a delay in the production of “Fifty Shades Darker” on differences between Universal executives and E.L. James, the author of the best-selling trilogy about Christian Grey and Anastasia Steele.

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Domestic box office totals for "Fifty Shades of Grey," the first movie, topped $102,000,000 as of Feb. 18, 2015. The movie was released just five days earlier, on Feb. 13, 2015. (Source: BoxOfficeMojo.com)

With a production budget of $40 million, that’s a pretty good return.