Kate Middleton
Kate Middleton visits The Foundling Museum on March 19, 2019 in London. Getty Images/Eddie Mulholland

Kate Middleton just dropped a major clue regarding her rumored pregnancy. Just months after Prince Louis was born, speculations claimed that the mom of three is already working on her and Prince William’s fourth child.

But on Thursday, the Duchess of Cambridge participated in a sports event where she lost to the Duke of Cambridge. On the same day, Middleton was also photographed in a striped knitted shirt when she arrived at the Royal Yacht Squadron with her husband.

Middleton’s colorful striped top was paired with her high-waisted trousers from L.K. Bennet, which is priced at $181. But eagle-eyed royal watchers noticed that Prince George’s mom sported a different hairstyle during her most recent outing.

And it was also very evident that Middleton’s hair was newly-colored. If Princess Charlotte’s mom is pregnant with her fourth child, she wouldn’t have been using hair dye. According to the NHS, the use of hair color among pregnant women may actually be risky for their unborn child.

The NHS also said that it is very common for pregnant women to wait until they reach the 12th week of their pregnancy before they apply hair dye. It is unlikely that Middleton is three months pregnant because she doesn’t have a baby bump. In fact, her waist is as small as ever.

Meanwhile, Prince William’s wife also made headlines this week after parents praised her for her fantastic response after Princess Charlotte showed her cheeky side at the charity regatta.

The 4-year-old was photographed sticking her tongue out at photographers. The minute Middleton saw what her only daughter was doing, she called her attention but she also couldn’t control her laughter.

Several fans praised her for her natural reaction and said that she has so much grace. Other fans also called Princess Charlotte’s latest gesture cute and hilarious.

“Just a normal child! You can’t control their every move… Kate’s response was fantastic,” one royal fan said.