Kate Middleton, Prince William's Baby No. 4 Unlikely To Happen, Royal Expert Says

Kate Middleton and Prince William might not have a fourth baby after welcoming their third child, Prince Louis, a report has claimed.

Royal expert and founder of "True Royal TV" Nick Bullen spoke about the Duke and Duchess of Cambridge's family plans with Us Weekly. For him, they are unlikely to have a fourth child.

"I think they feel that they’ve got a pretty perfect family. I think Kate was always keen to follow with her parents, [Carole Middleton and Michael Middleton], and have that sort of family of five," Bullen told the outlet Tuesday while referencing Middleton's sister, Pippa Middleton, and brother, James Middleton, who just got married last week. "She’s [now] matched it. And I think my view is [that] they’ll probably stop here."

He added that Middleton, 39, had a "really tough time" during her first three pregnancies due to hyperemesis gravidarum. According to Healthline, the condition is "a thousand times worse than morning sickness" and can cause serious life-threatening health issues.

When Prince William and Middleton announced their third pregnancy, the palace canceled the duchess' planned engagement for that day. She had been missing for months because she was advised to have a bed rest.

Bullen believed that the future king and queen consort will focus on their work this time instead of expanding their family.

"They are really focused, over the next 12 months, on their work," he continued. "Both of them turn 40 next year. They are really keen to be promoting their charities, their initiatives [and] foundation. I think for them, the next 12 months [are] all about the work."

Middleton had also addressed the rumors about her and Prince William having a fourth baby in a previous interview. The duchess hinted that it wasn't in the cards.

"I don't think William wants any more," the duchess said.

Meanwhile, Prince William and Middleton's charity, the Royal Foundation, just announced its commitment to improving "equality, diversity and inclusion" in its future philanthropic decisions. The foundation wants to ensure a "positive, safe and respectful environment" and promote the well-being and dignity of its staff, partners, suppliers, applicants and those whose interests it represents.

"[The foundation] aims to promote equality of opportunity and diversity and to tackle any forms of discrimination, harassment or bullying within its working environment, whether on grounds of age, disability, gender, gender reassignment, marriage or civil partnership, pregnancy or maternity, race or ethnic origin, religion or belief, sex or sexual orientation, and discrimination by association," the charity added.