Credit: Dan Kitwood/Getty Images Photo: Pregnant Kate Middleton and Prince William, June 4, 2013

What timing! Pregnant Kate Middleton's baby with Prince William is due any day now, but a new book provides details about a rough patch between the two lovebirds.

According to Michael O'Mara's new biography, Kate, Prince William had a habit of partying with "glamorous half-naked girls" for a while there. Kate, according to the book, got sick of seeing photos surface of her then-boyfriend posing for saucy photos with party babes, and briefly broke off their relationship in 2007.

A break was probably good for the pair, who were college sweethearts before they were Duke and Duchess. Kate reportedly visited multiple art exhibits with her friends and traveled with her mother, while William, the book says, focused on his royal duties and charitable efforts. Maybe that's how he conquered his party fever!

We all know this sad story's happy ending: the two reconciled, and got married four years later. We wonder if Kate thought she'd actually be carrying a future king or queen during the break!

Source: E! News