Fragile Hearts - Fallen Stars, #1

Zune is an ancient cyborg that was built one thousand years ago to protect. When Xian is saved by her from a giant destruction unit, they quickly fall into an intense sexual relationship. Zune is so ancient, however, Xian worries if she is still capable of love, or if having taken on cybernetics has made her more robot than human. When they meet a robot who needs help repairing her friend, it gives them both the chance to find out. Don't miss the first installment in this lesbian romance series! --Xian stuck her hands on her hips.
"What is so amusing?"   "You, " said Zune, "and your gentle heart. Twenty-three years in the ruins, " she went on, ignoring it when Xian blushed, "and you never let life here harden you, even after the robots killed your family, even after all you have suffered, you didn't let it make you distant and cold.