The 35-year-old is mum to daughters Poet, six, and Jagger, three, and said she doesn't stress about keeping her body in shape.
She said to OK! magazine: 'Don't be so hard on yourself. Drink lots of water, and use things in your house.
'You don't have to go to the gym. You can use a couch, you can use a chair, you can do sit-ups and things that don't break the bank.'
Asked what she would have for her last meal on earth, she said: 'I'd have lots of sweets and desserts and just a big family feast, and blueberry pie that I made with my girls.'