Is the marriage of Jay-Z and Beyoncé on the rocks?

Is the marriage of Jay-Z and Beyoncé on the rocks? It's tough to trust an extensive but anonymously sourced New York Post Page 6 article, headlined Inside the crumbling marriage of Jay Z and Beyoncé:

They are one of the most famous couples on earth, yet intensely private — rarely allowing a glimpse of anything but the picture of a marriage and partnership that is constantly, blissfully happy.
But a source who has been close to Beyoncé and Jay Z for years tells The Post that all is not well — and hasn’t been for quite some time.
This is the first peek behind the firewall that is Beyoncé and Jay Z Inc. — what drew them together, why they’re headed for a split and why love was never the thing that held them together.

If the allegations are ever confirmed, they'd remind us how the Jay-Z mystique, compounded by his mega-celebrity wife, was used to sell the Barclays Center, via their concerts and their paparazzi-drawing presence at the basketball sidelines.