It seems Prince William has no problem poking fun at his wife, Kate Middleton!

Earlier this week, the Duke and Duchess of Cambridge, both 33, stepped out to attend ICAP’s annual Charity Day, where they made phone calls to help stockbrokers close deals with traders in London’s financial district.

kate middleton

Kate at ICAP’s Charity Day on Wednesday, Dec. 9.

While William reportedly asked one client on the phone, “Is that all, James? Is that all you can do?,” Kate’s tactic for clinching deals was… flirting!

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After eavesdropping on one of his wife’s calls, the father-of-two joked, “Catherine, I think you can stop flirting with them now!” According to Us Weekly, William then turned to a trader standing nearby and said, “Sorry, my wife is just embarrassing me!”

During their visit, the royal couple — who are parents to Prince George, 2, and Princess Charlotte, 6 months — also played a game of ping-pong at the ICAP offices.

“Come on, let’s try and have more than a rally of more two goes. You’re not normally this polite when we normally play!” William reportedly teased Kate during their match. “Or this quiet!” she replied.