Solia’s Moon by Lyn Brittan

When her terraforming company expands into creating humanoid life, Lunar Physician Solia Calian has to find a way to stop them. She’ll have the help of her ex, the mysterious sheriff Giancarlo Sable, but they’d better hurry up. When the creatures they want to liberate start turning on them, figuring out where the real danger lies is the only way to leave the colony in one piece.