You saw the Whites in concert in the early 80s in Omaha NE There was a third female in the band - is there another White sister?

You saw the Whites in concert in the early 80s in Omaha NE There was a third female in the band - is there another White sister?
If you are refering to Buck, Sharon & Cheryl White of The Whites then yes there is another sister who sings backup and that would be Rosie White. There is a fourth sister who doent sing with the group named Melissa!