If she's young and/or not used to handling, you should expect this. Snakes aren't people pets, but they can become tolerant. Make sure your hands don't smell like rodents or anything. The gloves seem like a good idea if you think you might hurt her like that. Don't back off if she gets defensive. She needs to learn it does no good. And the kids should know that snakes do bite, imo. No reason to get complacent.