Personally I haven't read "50 Shades of Gray".  I'm waiting for the 3-D movie.  Now it seems that Marvel Comics is giving into the popularity of the book.  Here's the story from

The Marvel Comics announced a deal today with fellow Disney-owned company Hyperion to publish two action and adventure romance novels featuring the popular super-heroines Rogue and She-Hulk. In a press release the company says the "novels showcase strong, smart heroines seeking happiness and love while battling cosmic evil."
The She-Hulk Diaries focuses on Jennifer Walters (aka She-Hulk) who is trying to balance climbing the corporate ladder during the day with battling super villains at night "all while trying to navigate the dating world to find a Mr. Right who might not mind a sometimes-very big and green girlfriend."
Rogue Touch centers on the popular X-Man heroine who can absorb another heroes powers through touch. After she accidently puts her boyfriend in a coma, Rogue runs away from home. She then meets the "handsome and otherwordly Jame and sparks fly."
Rogue finds herself caught between her superpowers and "the only man alive who seems to truly understand her."
Hyperion will publish both novels in June In announcing the series Hyperion Editor-in-Chief Elisabeth Dyssegaard said, "it’s a great time to explore what happens to super heroines when they are dropped into traditional women’s novels.”

I wonder if we can look forward to Spider-Woman on a stripper pole?