No - don't let her get to her stitches! This can irritate the wound, and if it is still quite fresh, they can gnaw at the stitches enough to open the wound and infect it by licking (as their mouths carry a lot of bacteria!). Keep the cone on as much as possible - it should extend to just beyond her nose. You can also try using a childs t-shirt and making her wear it, to protect the stitches on her tummy. Not fun, but it's a bit of peace of mind for you, and doesn't have to be on long. Also try socks for her feet, otherwise there are products such as Chew Stop, and other bitter tasting remedies to deter them from chewing surgical sites.

If all else fails, get her bandaged by the vet! But it is so important that those stitches have as little interference as possible, to ensure a healthy and clean wound.