In a revelation that sent shockwaves through the royal family, Prince Harry's tell-all memoir, "Spare," exposes a tense confrontation shortly after his brother's wedding that triggered a bitter rivalry between Meghan Markle and Kate Middleton.

According to Harry, tensions boiled over during a gathering meant to mend fences following his and Meghan's African honeymoon. It was there that a seemingly innocent comment from Meghan, suggesting Kate was suffering from 'baby brain' due to her hormones, ignited the storm.

The confrontation escalated when Prince William accused Meghan of being "rude," pointing a finger at her and declaring, "These things are not done here." Meghan, standing her ground, retorted, "If you don't mind, keep your finger out of my face."

In a bid to smooth things over, Meghan expressed regret if her comments had come across as offensive, insisting she meant no harm. Yet, Harry notes, Kate was not ready to let it slide and demanded an apology, stating they were "not close enough for you to talk about my hormones."

Adding fuel to the fire, Harry describes Meghan's astonishment at the lavish décor in William and Kate’s apartment, contrasting it to their own Ikea furnishings. This only further strained the air between the two royal women.

As the evening unfolded, emotions ran high, but the couple insisted on a group hug to attempt to clear the air. However, the tension hinted at deeper-seated issues that would only grow as time went on.

Royal expert Tom Bower, in his book "Revenge," further complicates the narrative with claims about conflicts over bridal attire, hinting at alleged comparisons made by Meghan regarding Princess Charlotte's dress. This suggests a rivalry that was both personal and professional, extending beyond just the infamous ‘baby brain’ comment.

As the drama continues to unravel, one thing is clear: the rift between Meghan and Kate has roots that go far deeper than a single remark.