You can't let your birds go hungry, so you're going to have to go in and feed and water your birds. Hopefully she'll stay on her nest, but don't be surprised if she gives up. You're going to want to mark the eggs she has as well. Otherwise, she's likely to keep collecting eggs until she has so many that some will not get warm enough. If you mark the ones she has, you'll be able to remove the new ones she collects, giving them a chance.
Keep a close eye on her. Even if she's undisturbed, she's likely to give up halfway. At that point, you'll either want to have an incubator warmed up and ready or be prepared to give up on the eggs.