She’s likely to use it to her favor and in many cases won’t likely cause harm. The Committee alone will make it’s decisions with or without her obtaining quotes but if the projects are required by you then it might actually save you some time. Or waste her’s when you reject them outright. If it’s getting to you, you could easily respond to whoever sent you the quotes advising them she is not authorized or been asked to seek quotes and these approaches are best first checked with another/nominated person to save you all the time when there is little chance any work will be approved or forthcoming