Kate Middleton is rumored to be expecting her third child with Prince William following the birth of Princess Charlotte in May, Ok! Magazine reported in its latest issue.

The report said that a palace source revealed that although the royal family members are excited about the prospect twins, the Duchess of Cambridge is “little discouraged” with her pregnancy. A photo of a sonogram was released on the magazine cover bearing the news.

“To say she [Middleton] was shocked would be an understatement,” a royal insider said, according to Hollywood Life. “She’s suffering more from exhaustion than anything else.”

“She [Middleton] hasn’t had much of an appetite, so she’s hardly gained any weight. Kate is very good at putting on a brave face, but everyone just wants to make sure she’s taking care of herself,” the source added.

It is said that Middleton wasn't happy about knowing that she will be having another two babies.

“Kate was a little discouraged. She wasn’t sure if she would cope. She’s still in the fog of having a newborn, and the thought of months and months of more sleepless nights with two babies caused her to panic,” the source said according to the magazine.

Back in July, Prince William said in an interview with The Telegraph that he wants to expand his family saying, "We've only just had the second one. You never know what is going to happen in the future," he said.

Despite the desire of the Duke of Cambridge to have more kids, the pregnancy rumors of the Duchess weren't confirmed by the palace officials yet.

Meanwhile, the reports of Middleton having twins were ditched by Gossip Cop as revealed by a palace insider saying that the story is categorically “untrue.” It also wrote that “the Palace has not released a statement about Middleton being pregnant nor a sonogram of her alleged twins."