https://www.thecowboychannel.com/story/43275721/cat-spraying-no-more-secret-book-review-does-it-work
When your cat first gives birth to her kittens, resist the urge to pick them up. This is a crucial time for kittens to bond with their mother and learn some basics, so leave them alone. You should be able to have more interaction with the kittens after about a week.