Greg Kelley's sister, Nathalie Frances Kelley, born in 1932, was the eldest of the six Kelley siblings. She graduated from Emmanuel College in 1955 as a science major, and became a biology and driver’s education teacher at Ashland High School. Nathalie lived at home and became Greg’s chauffer and support system. She traveled with him to competitions and to East Lansing for summer training. In the spring of 1959, Greg decided to move to Colorado Springs and train with Edi Scholdan; this decision impacted his sister as well. She moved with him, continued to support him, and became his personal tutor.