Children Of The Sun: Charlotte Prentiss

Ten thousand years after the last Ice Age swept the Earth, a peaceful tribe of cave dwellers hunt and till the land. Beautiful Nisha, known as the defiant one, dares to choose her own mate despite the tribe's disapproval. The have an infant son, destined to become the Great Hunter. Then one night, their world is destroyed by a band of pillaging, raping nomads. Nisha watches helplessly as her husband and son are murdered, and she vows vengeance. With wit and wile she plays her captors against each other, outsmarting and taming their brutishness to escape into a new life and adventure.