Kate Middleton has been noticeably absent from the eyes of the scrutinizing public. Now, royal watchers are wondering what is happening inside the envied royal life of the Duchess of Cambridge.

Since giving birth to Princess Charlotte on May 2, there have been incessant rumors that Kate Middleton was suffering postpartum depression. In an article published by Celeb Dirty Laundry, it suggested that the 33-year-old Duchess was getting paranoid over her personal life's troubles.

When Kate Middleton was introduced to the public, she immediately captivated the world with her humble beginnings and exquisite grace. Since her similarities with Princess Diana were hard to ignore, Middleton was often compared to her and even dubbed her as "The People's Second Princess."

Being a royalty, however, comes with a price. Aside from privacy issues, Kate Middleton is struggling with Queen Elizabeth's demands, fears over Prince William's infidelities and silent cases of postpartum depression. Now, royal watchers are having a field day speculating about the happenings in the lives of their current favorite royal couple.

Last Saturday, the Duchess of Cambridge ditched the wedding of socialite Daisy Dickson and Old Harrovian estate agent Bear Maclean in Devon. Her husband, Prince William and sister Pippa Middleton, attended the event on her behalf. Because of her noticeable absence, rumors have it that the royal couple is experiencing some marital woes, Daily Mail noted.

Fortunately, Middleton's absence was part of "Middleton Rules," which ensures that the Duchess will continue to enjoy her privacy. According to a separate Daily Mail report, the so-called "Middleton Rules," which was drafted so Kate won't suffer the fate of Princess Diana, emerged immediately right after the royal couple's wedding and the rules apply to all aspects of their lives including raising their children Prince George and Princess Charlotte.

With Kate Middleton's absence from a wedding event last Saturday, media outlets speculated that the "Middleton Rules" applied. However, the Duchess of Cambridge was also noticeably missing in other public functions while husband Prince William was visibly and socially attending several bachelor parties. That's why some assumed that the couple is sorting out some marital issues.

This was not the first time that Kate Middleton and Prince William experienced some troubles in paradise. In fact, they had a month-long separation during Kate's second pregnancy. But the royals were quick to hide the problem with a cover story of hyperemesis gravidarum. And with the Queen's intervention, the royal couple ditched their marital woes and publicly appeared with a united front.

"It's no secret Prince William and Kate Middleton are having marriage troubles," another CelebDirtyLaundry report claimed. "The two secretly split while Kate was pregnant with Princess Charlotte. William didn't see Kate for an entire month, but Queen Elizabeth reunited the two and the royal couple returned to smiley public appearances."

In other news, Kate Middleton and Prince William are set to embark on a foreign tour which will commence in six months' time if everything will go as planned, Inquisitr reported. Lately, the royal couple has not taken too many royal duties because of their respective personal responsibilities. But now, the royals are gradually easing back into their roles within the royal family.

Meanwhile, the rumors about Kate Middleton's postnatal difficulties have been slammed as false. The reason behind her absence on several public events was linked to her unpreparedness to return to active duty. The Duchess of Cambridge will not also join in the tour with Prince William until she is fully ready.