Rain God — Amy Ruttan

A thousand years in the future there is no water on Earth and the Interstellar Space Organization is finding a way to bring it back, but the Hazoor faction is intent on stopping them. On a mission to the dead planet, sexy Commander Shana Kelley discovers a mysterious cavern and a turquoise stone. Not what it seems, the stone contains an ancient rain god who claims he can make the water come, but on one condition, she must come first, mating with him deep inside the cavern. Shana gives in to all her erotic desires, letting T'koh, the sensual rain god, show her the power of water over life.