The Summer Lands, in the forest not far from the Unseelie Court palace

Prince Gideon na Feransel stared at Maeve and wondered, not for the first or tenth or even the hundredth time, how the smartest, most powerful Unseelie Court Fae prince in recorded history—himself, naturally—had been saddled with an idiot for a sister.
“Maeve, if you’d quit playing with your hair and listen for a single minute, I’d explain this in words even you could understand.”
Maeve continued brushing her silky blue-black hair and rolled her eyes at him. Which he hated—which she knew.
Damn Fae princesses were astonishingly arrogant.
“We tell the humans we’re cousins, because the closer relationship of brother and sister would involve certain expectations we don’t wish to entangle us.”
She handed her hairbrush to one of the fawning males who always surrounded her. “Such as?”
“We’d have to pretend to like each other.”
Her delicate features screwed up in a tiny moue of distaste. As Fae, she could never be truly ugly, but Gideon privately thought this expression came close. Of course, his taste ran to paler beauty. A certain blonde had caught his eye.
“You’re wrong, in any case, brother,” she said. “I know many human siblings who despise each other.”
“This is all beside the point, Maeve. Now if you don’t mind, please send your entourage away so we might speak privately.”
She shot a speculative glance at him, reminding him anew that vanity was not a signal of lack of intelligence. Anyone who underestimated Maeve na Feransel was a fool, and Gideon was many things, but never, ever a fool.
“Go,” she said, waving a slender arm. The various men—lesser Fae and human both—all bowed and fled, obeying her order with an alacrity that underscored his reason for the conversation with his sister.
He leaned against the trunk of a winged elm tree and inhaled deeply, comforted by the scent of all things green and growing. The soil beneath his boots was a touch dry, but he knew rain would soon arrive to soothe and nourish the forest. The connection with the earth and all things growing was so much a part of Fae nature that he sometimes wondered how humans survived without it. Perhaps it was how they could destroy nature with so little concern or remorse.
Perhaps he was a fool to try to save any of them, but then again, he did occasionally need them. All of that chaotic life-force energy was so delicious.
“I’ve put out the word that a very wealthy buyer will pay top money for the sword Vanquish,” he said. “I’ve also told Telios, but that fool vampire is more interested in murder and destruction than anything else, so I doubt he’ll be able to come up with a coherent plan to steal it.”
“Why don’t you just steal it yourself?” Maeve turned away from him and bent to admire a profusion of wild orchids tangled around the base of a jasmine bush. “I know you’re only after the Siren and what it can do. The power to enthrall shifters on a large scale? Why would you possibly care about that?”
“Power held is never useless. Far more important, though, is power withheld from others. If the vampires were to learn what the Siren can do, their misguided attempt to take over the entire world would be one step closer to its realization. Even you should realize that this would be utter annihilation for the Fae.”
“You do know that Rhys na Garanwyn is working with the Atlanteans toward the same end? Why not join forces?”
Rage flared inside him with sudden, sharp intensity. He forced it to recede. The time would come for him to unleash his fury. Not now. Not yet.
“I will consider all options,” he managed to say calmly. “For now, if you see your little human friend, encourage her to steal the sword for me.”
“Friend? What are you talking about?”
He started laughing at her so-obvious attempt at deception. “Don’t bother to deny it. I know that your friend Lady Fiona is a thief. The Scarlet Ninja, isn’t that what they call her?”
She whirled around, and he saw her shock before she masked her emotional response.
“I don’t know what you’re talking about. She—”
“Don’t bother,” he repeated, folding his arms over his chest. He was enjoying this. “I targeted her, specifically, by making sure her contacts got the word. She has Fae in her, you know.”
This time, his beloved, wicked, deceitful sister could not hide her shock. “How did you know?”
“The way you were drawn to her from the first, when you attended that human school. Don’t you think we noticed? Do you really believe we would allow you, a Fae princess, to mingle in the human world without constant surveillance?”
She shook her head. “No. I would have known. I watched for anyone. There were no guards.”
“There were dozens of guards, you fool,” he said, enjoying the way her lovely white skin paled even further. “Always. The first time we caught her shadowing, we backtracked her heritage. We’re almost certain she’s of Fae blood. Probably Seelie Court, and quite possibly royalty.”
“You leave her alone,” Maeve said hotly. “She’s mine.”
“Yours? I thought your tastes ran only to the male of the various species.” He swept his gaze over her luscious curves. Too bad she was his sister. He was in the mood for a little bed play.
“Not like that. She’s my friend. You hurt her and you will answer to me.” Her voice was quiet as she said it, but somehow deadly. For just an instant, a chill of apprehension slid over him, but then he came to his senses. She was so far below him in the hierarchy of power as to be entirely unimportant.
“You aren’t threatening me, are you, little sister?” He strode over to her, crossing the distance between them with slow, deliberate intent. “Never forget who holds the power of Feransel. I could crush you with a thought.”
She paled again but said nothing. Just bowed her head.
“Permission to return to my rooms, Lord Feransel?” This time, her voice held nothing but submission and a tinge of bitterness.
Better.
“Yes, go. But have a care. If Telios approaches you, be sure to emphasize how important that sword is to me, but make no mention of the jewel on its hilt. I’d steal it myself if William’s witch hadn’t ensorcelled it to destroy any Fae who touched it when not freely given.” He laughed. “William the Conqueror, indeed. How did they never wonder how he became such a conqueror? A powerful witch on his side for all those years, and none suspected.”
“You knew,” she pointed out.
“Yes, but what care did I have for human affairs at that time? There were more than enough of them and the vampires still hid in the dark. Now, things are different. I want that gem. A perfect aquamarine, or so I hear.”
She bit her lip but said nothing. Probably thinking about her next bed partner. Useless female. He made a go-away gesture with his hand and she all but ran off down the path toward the palace.
“The Siren and Lady Fiona. I’ll have them both. Quite lovely prizes for one who seeks to rule both courts, don’t you think?” he asked the empty air.
Only the trees heard his laughter.