Her uncle Roy "DOC" Walker is an inductee in the Arkansas Hall of Fame for Track and Field. At her High School he had a track meet named after him called the "Doc Walker Relays".
Mary grew up in a twin city that sits on two states - Arkansas and Texas "Texarkana".
Her aunt Sheilah Walker is a Broadway Musical Director in New York. She was the former musical director for Oprah Winfrey's "The Color Purple" tour.