Worships at the altar of sister-cock (ENDing)

"I want. . . I want," Kat's eyes were dilated, and her nostrils flared as she breathed deeply and caught a whiff of pungent cum, "I want to get fucked."

Kiki smirked. "And who would do the honors dear sister? Damien?" she glanced at their friend, who just sat back and crossed his arms with a shit-eating grin on his face, "but you're so sure he's a confirmed bachelor. I guess if you turned around he could do the job, I suppose you should just bend over the table."

"No!" shouted Kat, "I mean," she also looked at Damien, but then with lightning speed was staring at Kiki's cock again, "I want that," she pointed, then her shaking hand went to grope her right tit in her skin-tight dress, "I want everything to do with that piece of art."

"Then do what I said sister, and bend over the table."

Kat was up in a flash, simultaneously pulling up the bottom of her dress until it was well up over her hips, and practically threw herself onto the table, her moderate tits providing a little cushion. She wiggled her bare ass, juicy round cheeks squeezed tightly together, in the rough direction of her sister.

Kiki laughed and stood up. "You really want my cock sister? You want my long gouging tool reaching where nobody has before, penetrating right up through to your cervix with its breeding tip, and filling you with my—"

"YES!" screamed Kat, "just put it in me already!"

Never one to deny her sister, Kiki stepped up behind her and parted those beautiful firm ass cheeks to fully reveal her older sister's glimmering needy pussy. It was gaping and winking, outer lips engorged, but actually quite tiny and cute. Kat's insides were a cute pink, and nothing like Kiki had imagined the insides of a slut would look like. Well if there was any remodeling to be done, her cock was the tool to do it.

Kiki thrust halfway into her sister in one go, and Kat screamed and shuddered under her. The auctioneer was droning on about something up front, but Kiki could see everyone at the nearest tables looking over to watch the show. With a potent grin, Kiki savored the clinging wet flesh of her sister's pussy for a moment of bliss, then reached up and tugged down her sister's dress, bunching the whole thing around her sister's middle, revealing her sister's delicious perky tits to the air. She fondled those soft mounds, feeling her sister's hard nipples pebble in her palms, but after a minute or so of reveling in the moment, decided it was time to get to fucking.

With her hands on her sister's ribs, Kiki slammed Kat down onto the table, forcing her on her tiptoes, and angling her pussy up so that the slightly taller Kiki could really pound down. Slightly taller? Kiki realized there was at least one more change to her body than her perkier tits, and her hardcore new dick.

Kat screamed in pleasure as Kiki thrust deep and fast, the tip of her cock poking something inside her sister, sending a shock of pain-pleasure through her brain with every collision, but never quite putting the last few lengths of cock into her sister's depths. She fucked her sister mercilessly into the table, flattening her sister's tits onto the hard surface, and scratching from the strength of her iron grip just under the swell of those delightful mounds.

At some point Lexi crawled out from under the table, and stood demurely next to Kiki. Without a care for the cum covering her lips and face, Kiki slowed her fucking slightly and grabbed Lexi by the waist to pull her close and mash the elf's pretty lips with a hot kiss, their tongues inevitably collecting bits of cum. Tasting herself grew Kiki's arousal, the tangy musk penetrating right to her brain with its potent smell, and bitter-clear flavor.

Underneath her, Kat broke down into tears and sobs of delight, shaking uncontrollably, her pussy ravenously tightening around Kiki's length as if it could keep hold of it forever. Well, Kiki grinned evilly, while she couldn't give her sister her cock forever, there was a way she could at least give her something memorable for nine months that would last a lifetime. A lifetime during which Kiki would give Kat as much cock as she was willing to share with a rotating stable of other sluts.

Yes, that sounded perfect.

Kiki leaned in, over, and onto her sister's back, slowing her penetration to a crawl, then to a stop, leaving herself only half sheathed in her sister's wrapping heat. Kat whimpered and tried to shove her hips back, but there was nothing she could do under Kiki's weight and grip.

"You're my slut now sister, and only mine. You'll get cock as long as you're a good girl and do what I want, and try your best to see to my needs. If you don't obey," Kiki smacked Kat on the ass, and Kat's hips writhed as a small orgasm shot through her, "then you'll never feel this way again. Understand?"

Kat nodded manically, her head limp against the table, trying to lift it to look at her sister but struggling with the angle.

"Good." Kiki lifted herself off her sister, and pulled back and out of her. Kat whined like an animal, and Kiki flipped her sister around. "Be patient slut, I'm cumming inside you, and I want you to look at me while I do it."

"Y-yes," said Kat breathily, seemingly unable to close her mouth, "inside me. Always inside me."

"That's a good slut," said Kiki, and she grabbed hold of her sister's legs and hammered her way completely inside with one thrust-pull, her feminine cock tip sliding with ease into the deepest part of Kat, the normally resistant opening of her cervix no match for the pure breeding proficiency of Kiki's magicked dick. By instinct, driven by experience, and set afire by flaming lust, Kat wrapped her shaky legs around her sister's hips and feebly pulled her just a touch further inside her warm slick tunnel, welcoming her to where Kat would forever want her. Their eyes met, and Kiki smiled, a sensual mixture of love and possession.

"Fuck. Good slut. Well trained, I'm, ugh—" Kiki came, splashing the most intimate parts of her sister's insides with virile seed that seemed to never stop, until it was gushing in rivulets out of Kat's opening around the base of Kiki's cock, dripping down her ass and onto the tablecloth.

Lexi swept in and with an approving nod, and half-closed eyes, Kiki managed to leverage her sister up so that Lexi could wedge her head in, where she started licking and sucking at the dripping jizz. Kiki pulled out a little to give her some room to work, and felt Lexi's tongue alternate between where her and Kat were still connected, and running up her still-hard shaft.

"Oh yes, I think I'm going to like it here. Me and my pet," Kiki petted Lexi on the head, "and my new live in sister-slut, and breeding bitch, will all enjoy our time here at the Auction House."

Kat gasped, but didn't have the strength to say anything.

Damien grinned and finished his drink, motioning for a waiter to come over. His newest peer, no, his clear superior Kiki, would need to hydrate if she was going to put on more of a show.

Kiki reached out and touched her sister's belly. "Yes sister, you're whatever I want and need you to be, and I think it's time mom got those grandbabies she's been hinting at."

Kiki had sold herself, and won a better life in return. Quite a gamble to have pay off, but all — it seemed — was possible at the Auction House.