Deborah Allen wrote a Top 10 hit for which American country music vocal group consisting of two sisters and their father? 
Deborah Allen: Deborah Lynn Thurmond (born September 30, 1953) known professionally as Deborah Allen, is an American country music singer, songwriter, author, and actress. Deborah Allen:  Allen has also written No. 1 singles for herself, Janie Fricke, and John Conlee; Top 5 hits for Patty Loveless and Tanya Tucker; and a Top 10 hit for The Whites. The Whites: The Whites is an American country music vocal group consisting of Sharon White (born 1953), her sister Cheryl (born 1955), and their father Buck (born 1930).
The Whites