Health care providers (HCP) are increasingly using genomic sequencing (GS) to target treatment for patients. However, GS may incidentally reveal inherited risks for thousands of current and future diseases. Guidelines recommend HCP inform patients of incidental GS results. No decision aid (DA) exists to guide patients' decisions about which incidental GS results they wish to learn. This study will evaluate whether the DA followed by genetic counselling (GC) reduces decisional conflict compared to GC alone in a randomized controlled trial (RCT) with 128 patients with a family history of cancer, who have had a negative genetic test and may eligible for GS. A qualitative component with a subset of participants (n=40) will explore patients' preferences for the types of incidental results they wish to receive and their decision making process.