Bettey grew up in Australia and came to know the Lord in Scotland. She graduated from Prairie Bible Institute in 1961. In 1963 she joined Slavic Gospel Association and then transferred to InterAct (then Arctic Missions) in 1984, serving among the Aleut people on the Alaska Peninsula. Betty moved to British Columbia in 1991 to minister among the Sikhs, where she loved tutoring the children and getting involved with extended families. She retired in 2007 and moved back to her home in Australia.