Kate Middleton has admitted feeling guilty about lying to her children as she continued to homeschool them during the Easter holidays.
The Duchess of Cambridge said she felt "very mean" for maintaining lessons while other children across the UK enjoyed two weeks off from schoolwork.
Speaking to the BBC, along with husband Prince William, Kate said: "Don't tell the children, we've actually kept it going through the holidays. I feel very mean."
The duke described homeschooling as "fun" - and his wife added it was "challenging" - during the video call interview with Tina Daheley, broadcast this morning on BBC Breakfast.
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The Cambridges have been isolating with children Princes George and Louis, and Princess Charlotte.
During the interview, William also revealed the dispersed royal family has been chatting to each other on video calls throughout the lockdown period.
The couple also spoke about the mental health of the nation, with both having spoken to staff across hospitals throughout the UK about what impact the virus crisis has had on them.
William said the "scale and the speed" that the pandemic has spread across the country has left a heavy burden on the mental health of frontline NHS staff.
He said it is "very difficult" for doctors and nurses to be at the bedside of patients who are dying without any family around them on a daily basis - and that pain stays with them.
Drawing on his own experiences with grief, the duke went on to say: "People are going to feel angry, they are going to feel confused, they are going to feel scared - all normal feelings and that is unfortunately all part of the grieving process.
"But don't underestimate again the importance of reaching out, the importance of looking to your family and friends."
William and Kate are heading Government campaign Every Mind Matters, which focuses on looking after people's mental wellbeing during the Covid-19 pandemic - and not just NHS staff with many people struggling in isolation.
A video narrated by them is set to be broadcast across national TV channels and social media from Monday, April 20.
With the words “we’re in this together”, the couple herald the campaign which includes new NHS expert tips and advice on looking after mental wellbeing and supporting your family and loved ones during the crisis.
Go to https://www.nhs.uk/oneyou/every-mind-matters/ for more details.
