Sister Forbidden Affair with brother- Japanese NTR Incest Story by Salty Vixen

“I’ll get it,” she said.

The postman was a man in his forties with sun-creased eyes and a canvas bag that smelled of wet paper. He handed her a stack of envelopes and a small parcel addressed in her brother’s handwriting. When his fingers brushed hers he did not apologize. Aiko felt the familiar, stupid heat rise under her collarbone. She had been like this since she was nineteen: a body that answered before her mind could. Doctors had called it nymphomania once, in a clinic near Sapporo, and she had laughed in the waiting room because the word sounded like a diagnosis for weather. She still took the pill every morning. The blister pack sat on the bathroom shelf beside Kenji’s razor.

“Anything else?” the postman asked.

“No.” She smiled anyway, the way she smiled at most men when she was already wet and trying not to show it. He looked past her shoulder into the house, saw Kenji’s silhouette, and touched the brim of his cap. The bicycle chain clicked as he rode off.

Inside, she set the mail down. Kenji turned a page. “From your brother?”

“The parcel.”

“Open it later.” His voice was even. They had stopped pretending the arrangement was a secret two years ago, after the first time she came home with her brother Ryo’s fingerprints on her hips and Kenji had asked, quietly, whether she wanted him to leave or to watch. She had chosen the second. He had not left.

Ryo arrived just after dusk, still in the dark shirt he wore for the language school where he taught night classes. He was thirty-one, taller than Kenji, with the same narrow mouth Aiko remembered from childhood photographs and none of the careful distance they were supposed to keep. He kissed her in the genkan while Kenji stood in the doorway of the living room with his arms folded. The kiss was not brotherly. Ryo’s hand slid under the back of her blouse and stayed there until she made a small sound against his mouth.

“You’re early,” she said.

“Class finished. I told them the lesson on conditionals could wait.” He looked at Kenji. “You staying?”

“I always stay.”

They moved to the bedroom without more talk. Aiko undressed herself because she liked the way both of them watched her do it. The pill she had swallowed that morning sat somewhere under her skin; she thought about it the way she thought about weather, as a fact that let other facts happen. Ryo took the small leather case from his bag and set it on the futon. Inside was the ring gag he had ordered months ago and only used when Kenji was in the room. The metal was cool. He fitted it between her teeth, buckled the strap behind her head, and checked the fit with two fingers. She could not close her mouth. Saliva gathered at once and ran down her chin onto her chest.

“Slut,” Ryo said, not unkindly. He said it the way he said vocabulary words on the board, clear and repeatable. Aiko’s answer was a wet sound around the ring. Kenji sat on the low stool by the wall, trousers open, one hand resting on his thigh. He did not touch himself yet. He liked the first part, the teaching part, when Ryo made her say what she was.

Ryo pressed her onto her back and knelt between her knees. “Open.” She already was. He pushed two fingers into her and held them there while he spoke to Kenji as if the other man were a student who had asked a difficult question. “She gets like this after the postman. You noticed? She always does. Doesn’t matter who. Her body decides.” He curled his fingers. Aiko’s hips lifted. The gag turned the moan into something shapeless. “Birth control every day. She told me. So we don’t have to stop.”

Kenji’s breath changed. “She told me too.”

“Good.” Ryo withdrew his fingers, slick, and wiped them across her lower lip above the ring. “Say it.”

She tried. The metal held her tongue down. What came out was a vowel and spit. Ryo smiled. “Close enough. You’re a slut for your brother. Say the parts you can.”

She managed the shape of the word slut around the ring, and the effort made her eyes water. Ryo fucked her then, slow at first, one hand on the strap of the gag so her head stayed where he wanted it. The futon creaked. Rain ticked against the paper screen. Kenji watched her face more than the place where they joined. He had told her once that the watching was not about the sex alone; it was about seeing the version of her that did not perform wife for him. She had not known how to answer that, so she had kissed him and let Ryo come over the next night anyway.

Ryo’s pace changed. He pulled out, turned her onto her knees, and entered her again from behind. The ring gag swung a little with each thrust. Drool striped the sheet. He reached under her and rubbed her clit in tight circles until she came, shaking, the sound caught and broken by metal. He did not stop. “Again,” he said. “You can. You always can.” She did, smaller, almost painful, and he followed her, staying deep, one arm locked around her waist. When he pulled out, semen slid down the inside of her thigh. She stayed on her elbows, breathing hard through her nose, the gag still in.

Kenji stood. He crossed the room and unbuckled the strap himself. The ring left her jaw aching. She swallowed, wiped her mouth with the back of her hand, and looked up at him. He kissed her forehead, then her mouth, tasting Ryo and her both. His cock was hard against her shoulder. She took him in her hand without being asked. Ryo sat back on his heels, chest rising, and watched them the way Kenji had watched him.

“Teach her something,” Kenji said. His voice was rough.

Ryo laughed once. “She already knows.” But he leaned in anyway, close to her ear, and spoke while she stroked her husband. “Next time the postman comes, you invite him in for tea. You don’t have to fuck him. You just let him see you like this. Wet. Waiting. Then you tell me what he said.” Aiko’s hand tightened. Kenji groaned. She bent and took Kenji into her mouth, slow, the way Ryo had shown her he liked, and Ryo kept talking, low, about how she would describe the postman’s hands, about the pill on the shelf, about the word she had tried to say around the gag. Kenji came on her tongue. She swallowed because both of them were watching and because she wanted to.

Afterward they lay on the futon with the screen open to the wet garden. Ryo’s parcel was still unopened on the table in the other room. Aiko rested her head on Kenji’s chest and felt Ryo’s fingers trace the mark the strap had left behind her ear. No one spoke for a while. The house in Chibishi was quiet except for the rain and the occasional drip from the eaves.

Kenji said, “You’ll see him tomorrow.”

“The postman?” she asked.

“Your brother.” Kenji’s hand rested on her hip. “And whoever else you want. Just come home.”

Aiko closed her eyes. The ache in her jaw was already fading. She thought of the blister pack, of the bicycle bell, of the ring cooling on the sheet beside her knee. She thought of the way her body answered before she could decide, and of the two men who had stopped asking her to decide alone. Outside, the lane was dark. Somewhere down it, the postman’s route would begin again in the morning. She would be awake. She would be ready. She always was.