What happens if the sort of situation described in Fifty Shades of Grey occurs in real life?

It, of course, is oppressive:

An Italian woman who signed up to a bizarre contract promising total sexual and mental submission to her husband is now suing him for divorce and mistreatment after seven years of "slavery".

Seems sensible so far. Of course, in the current legal environment NOT doing this is also a problem:

In the case, filed in the High Court this year, the wife refers to the book in her grounds for divorce, which blames the breakdown of the marriage on the husband's lack of sexual adventure.