A royal expert is out here dishing on Kate Middleton and Prince William's relationship, and apparently they have their moments—just like any other couple! And by that I mean Kate allegedly treats Wills "like a fourth child" thanks to his propensity for tantrums. At least according to author Tom Quinn, who spoke to a very chatty source who used to work with the Prince and Princess of Wales at Kensington Palace.

Per said source (via The Mirror), "Kate treats him like the fourth child because he's prone to tantrums. They do have rows. It's not a perfect marriage. They have terrific rows. But, where some couples have a row and throw heavy vases at each other, William and Kate throw cushions at each other. It's always kept under control."

Quinn previously spoke about the couples' relationship back in April, saying, via OK, that "they have terrible rows" and that "Kate might seem to be a very calm person, and William also. But it’s not always true." He also noted that the "big stress for William and Kate is that they’re constantly surrounded by [palace aides]. It’s like a Jane Austen novel."

Meanwhile in May, a source opened up to Us Weekly about Kate and William’s relationship, saying, “No marriage is perfect, including Kate and William’s and they’ve certainly had their ups and downs over the years. They bicker like most couples and have recently been under pressure dealing with the drama surrounding Prince Harry.”

Oh, and speaking of Prince Harry + drama, lemme just....

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