Forrest was the daughter of unknown parents. The date and place of her birth have not been found.
Her husband was Charles Franklin Gibbons, who she married in Wise County, Texas. The date has not been found. Their four known children were Esse Vera (1907-1997), Claud Clois (1909-1980), Mozell Loys (1911-1985) and Verna Jewell (1915-1978).