The New England Patriots have ruled over the AFC for the past decade and a half, winning 15 division titles, eight AFC Championships, and five Super Bowls since the duo of Tom Brady and Bill Belichick teamed up to run rampant over opponents. The Pats have been one of the greatest dynasties in sports, but more and more cracks have been appearing in the foundation over the past year.

A new book by ESPN writer Ian O’Conner called Belichick: The Making of the Greatest Football Coach of All-Time claims the rift is growing deeper every season that the two legendary New England icons spend together.

“If you’re married 18 years to a grouchy person who gets under your skin and never compliments you, after a while you want to divorce him,” claims a source in the book.

“Tom knows Bill is the best coach in the league, but he’s had enough of him. If Tom could, I think he would divorce him.”

It’s been weird. Last year the Patriots unceremoniously dumped backup quarterback Jimmy Garoppolo in a trade to the 49ers — an odd move considering their incumbent starter is now 41-years-old and Garoppolo is just 26. Reports at the time claimed a power struggle between Brady, Belichick, and owner Robert Kraft led to the trade. Additionally, there was the issue of Brady’s questionable personal nutrition “coach” Alex Guerrero being banned from Patriots sidelines and flights.

The new book also apparently re-opens the Deflategate and Spygate controversies, with both Brady and Belichick questioning the honesty of the other when it comes to denying responsibility.

The Patriots dynasty will end eventually. Belichick will retire (or move on) and Brady can’t play forever. Until then though, it will be fun to watch how the best coach-quarterback relationship in football ends its captivating tale.