Princess Kate Middleton is still grappling with the draining aftereffects of her cancer treatment, but she's determined to gather her strength and be ready to step into her future role as queen – because she's aware that King Charles , her ailing father-in-law, may not be long for this world, courtiers reveal.

That's why Britain's beloved Princess of Wales has once again taken a break from public duties with the full support of hubby Prince William , RadarOnline.com can reveal. Article continues below advertisement

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Middleton, 43, has rarely been seen in recent months, attending Trooping the Colour and the Wimbledon tennis t

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