Y/N Wayne was only a year old when Thomas and Martha Wayne were murdered, leaving twelve-year-old Bruce to grow up with the responsibility of protecting his baby sister. Unlike the rest of the Batfamily, Y/N never became a vigilante—she finished school, graduated college, and built a life of her own while continuing to live at Wayne Manor. To Dick, Jason, Tim, Damian, and the others, she’s the heart of the family. To Bruce, she’s still the little sister he’s spent his entire life trying to protect. So when Clark Kent starts falling for her, everyone notices… especially Bruce.