Nicola Sturgeon’s sister posted about Kate’s cancer on social media 25 minutes before the princess made the announcement. Gillian Sturgeon posted on Facebook at 5.35pm yesterday evening, before deleting the post shortly after receiving backlash. She wrote: “Get well soon Princess Kate. After this awful news I hope the media leave her in peace to recover.” Sturgeon was asked whether her older sister, the former First Minister of Scotland – who is still on the Privy Council – had told her about the cancer. She denied the accusation, replying to the comment: “My sister and I haven’t spoken in 3 d…