From the book: Lost Tribe of the Sith-Book 1-The Collected Stories
During the reign of Naga Sadow Yaru Korsin marries a woman, Seelah (Devore Korsin’s woman before he dies at the hand of his brother Yaru)
Excerpt: “What had happened to Ravilan’s people was partially due to Korsin’s failure at managing that, though he didn’t mind the result. Unlike his wife, he had nothing against the crimson-skinned Sith, but factions threatened order. A homogeneous Sith people was easier to rule.
His wife. Marrying Seelah had been another nod to stability, a bridge between Omen’s crew and its mining-team passengers. There she was, across the dais, greeting the dignitaries the Keshiri were allowed to have. Greeting, that is, without actually touching any of them. Korsin never touched her anymore, either. It was a shame: she was gorgeous now, auburn hair cascading in ringlets around flawless dusky skin. He didn’t know what dark sorceries her team of experts had wrought, but she looked scarcely a day over thirty-five”
But these are marriages for power and posturing as denoted by the reading of Yaru’s will by his daughter to his wife
Excerpt: “I came here because we just had the reading of Father’s final testament,” she said. It existed—in her care. “He commends his legacy to me—and the three surviving High Lords have ratified it. So you see? You are the mother of the new Grand Lord. Congratulations.” Nida beamed. At her age, she could expect to rule Kesh for decades to come. “Or until the Sith come to rescue us.
Seelah sneered. “You are a child.” She slid from the slab, only to brace herself against it with her hands when her feet failed to respond. “No one’s coming for us. Your father knew that.”
“He told me. It doesn’t really matter to me, one way or the other.”
“It should,” Seelah said, struggling to straighten. “If I tell those people out there …”
Nida casually replaced the cup and stepped back toward the doorway. “There’s no one out there,” she said. “Perhaps you should hear the rest of Father’s final wishes. Henceforth, on the death of the Grand Lord, that person’s spouse and household laborers would be sacrificed. He got the idea from an old Keshiri custom. Technically, it’s to honor the Grand Lord—but you and I know what it’s really about.” She ran her gloved fingers through her hair. “I imagine it’s going to put a crimp in my social life, but I’ll cope.”
Seelah caught her breath. “You can’t mean to …?
They will most often marry other Sith (Force-User) to produce Force wielding offsprings