Aston was born in Pontypridd and attended Bryn Celynnog Comprehensive School. She married her husband, Dylan Aston, in 2002, and has two children, Ethan and Ellen. As of December 2015 is a Teacher at the GEMS Wellington Academy-Al Khail in Dubai. She has also been heavily involved in charity work, particularly relating to Down's Syndrome, and was the patron of the Down's Syndrome Association of Wales.