Nine months after she gave birth to Princess Charlotte, new reports are claiming that Kate Middleton and Prince William are expecting again! 

According to Royal watchers, the Duchess of Cambridge is not just pregnant with their third baby, but also their fourth as she is expected to deliver twins.  On top of that, it looks like Prince George will be the only boy in the family as the twins are speculated to be girls.

"It's early days, but the buzz in the royals' inner circle is that Kate's pregnant again, and this time she's got not one but two buns in the over,"  a source told OK! magazine. "They weren't even trying."

Prince William reportedly thought that Kate's announcement was a joke.  "He immediately called her and said, 'You're joking aren't you?" The source added. "'We're not really having another baby right now.' "

Rumors surrounding Kate's third pregnancy are claiming that the unexpected blessing happened because of the Duchess' fear of losing Prince William.  Rumor has it that Kate has grown overly concerned that Prince William will leave her for his ex, Isabella Calthorpe.

"Kate Middleton and Prince William's marriage relationship seems to be in trouble even though the couple is putting their best effort in hiding it," Movie News Guide reported. "The Duchess of Cambridge is allegedly afraid that her royal life with Prince William could end because of Calthorpe, the Duke's ex-girlfriend and preferred marriage choice."

"The 33-year-old Middleton's fears have increased because of Prince Harry and Cressida Bonas' reunion rumors. The Duchess of Cambridge has reasons for this. Bonas is the half-sister of Calthorpe. Moreover, the Duke of Cambridge has been linked with his ex Calthorpe after the rumors relating Prince Harry and Bonas' reunion emerged," the site added.

Stay tuned for more Kate Middleton third baby and pregnancy updates here!