Siblings Share a Single Train Berth

Cody was twenty-four, and the overnight train already felt too small for what he had carried out of their parents' anniversary celebration. His stepsister walked half a step ahead through the station so he would not have to decide where his eyes belonged. Annika was twenty-two. She had changed out of the black dress in the station restroom and into a sleep shirt and cotton shorts, and when the compartment door slid open, the booking error was sitting there in plain metal and thin mattress.

One berth. A single narrow bunk, a wool blanket, a rail, a curtain that would not quite seal the dark. The second sleeper had been double-sold. Nothing else was free until well after midnight.

"We'll take it," Annika said. Her voice held. Her hands did not. "It's one night."

He nodded. Saying no would have meant naming what they had both refused to name since the summer she turned eighteen and he was already twenty. Both grown. Separate apartments, separate jobs, and still the same heat every holiday: a glance held too long, a hug at the door neither of them ended first. He had never put his hands where he thought about putting them. The train did not know the rules.

The corridor outside had gone quiet, and the door had shut on the two of them and the hum of the wheels. Cody set his duffel on the floor because there was no rack that would hold it without blocking the ladder. Annika looked at the bunk, then at him, and the look lasted too long to be sisterly.

She climbed in. He followed, because the floor was a strip of cold linoleum and his shoulders would not fit if he tried to sleep in the aisle. The space closed. His chest met her back. Citrus shampoo. Heat through cotton. He tried to angle his hips away, and a long curve undid the angle.

Her ass settled against him. His cock thickened in his sweatpants before he could stop it, the shape of him pressed to her, and Annika's fingers locked on the rail. She did not shift forward. His knees tucked behind hers. His forearm lay along her ribs, and each breath lifted the soft underside of her breast against his wrist. He could smell her skin under the citrus, warm from the walk through the station, and the knowledge that he would have to lie like this for hours made his pulse thud in his cock and in his throat at once. Stepsister. Family by the marriage that had put them under one roof when they were already nearly grown, and still the woman he had wanted in secret since wanting her was only forbidden.

"Sorry," he said.

"Don't." She stayed. The car rocked, and the wanting stopped being something he could set down.

The rocking did not let them pretend. Every joint in the track sent a small shove through the bunk, and their limbs answered it. His knee slid along the back of her thigh. Her heel brushed his shin and stayed. The sleep shirt had ridden up; his wrist rested on bare skin at her waist, warm and fine, and he felt her stomach tighten under his hand when the car swayed harder and his cock nudged her again through the cotton.

"Cody." The walls were thin.

"I'm trying to give you room."

"You're not. And I don't think I want you to."

He closed his eyes. "Annika. If I don't move, I'm going to do something we can't walk back."

"Then don't walk it back." She turned her face toward the pillow, voice shaking and clear. "I've felt it for years. Since I was eighteen and you looked at me across Mom's kitchen like you were allowed to and then remembered you weren't. I wanted you anyway. I still do. I get wet thinking about you on the drive home from every family thing."

His hand flexed on her waist. "I want you," he said against her hair. "I've wanted you since that same summer. Not before. Not when it would've been wrong in a different way. Since you were grown and I still couldn't stop. I think about being inside you, and I'm done pretending."

"Then stop pretending." She reached back, found his wrist, and drew his hand up under the sleep shirt, over the bare curve of her breast. Her nipple was already tight against his palm. "Touch me. I want your hands. I want all of it. Say yes with me."

"Yes. Tell me if anything's too much."

"I will. You tell me too." She pressed his hand harder to her breast. "Don't be gentle just because of who we are. Be gentle if you want to. But don't stop because I'm your stepsister. That's the part I can't stop wanting."

He rolled her nipple between his fingers, slow, and she arched into it with a shiver he felt all the way down his cock. His other hand slid over her hip, under the waistband of her shorts, and found cotton panties already damp at the center. She lifted her hips to help him. He eased the shorts down her thighs, then the panties, and she kicked them to the foot of the bunk.

"Off," she whispered, tugging at his sweatpants. "I want to feel you."

He shoved them down with his boxer briefs, awkward in the narrow space, cock springing free against the bare cleft of her ass. She reached back and wrapped her fingers around him, a sure stroke from base to tip. He slid his hand between her thighs and found her slick, swollen, opening around two fingers when he pressed in slow and she pushed back to take them.

"God, Annika." He curled his fingers, rubbed her clit with the heel of his hand, and felt her clench. "You're soaked."

"For you." She stroked him again, tighter. "I want you in me. Not just your fingers. I want my stepbrother's cock. I've decided. You decided. So fuck me."

He kissed the hinge of her jaw and nodded against her skin. "Come here, then. I want to see your face when I do."

She turned in the cramped berth, knees bumping the wall, the rail, his thigh, until she was facing him and the blanket had slipped to their ankles. The reading light was a low amber slit. It caught the flush on her chest, the shine on her lower lip, the dark between her thighs. Cody lay on his back because there was no other way to make room, one shoulder jammed to the wall, and Annika swung a leg over him and settled astride his hips. His cock lay against her stomach, thick and leaking, and she looked down at it, then at his face, and smiled like a woman who had finally stopped arguing with herself.

"Hi."

"Hi." His hands found her hips. "You sure?"

"I'm sure. I want to ride you. I want to feel every inch while this train tries to throw me off." She reached between them, lined him up, and sank.

The first push stole the air from both of them. She was tight, wet heat closing over the head, then more, a slow inexorable slide as her body opened and took him. His fingers dug into her hips, not to rush her, just to hold on. She braced one hand on his chest and the other on the rail and lowered herself until he was buried, the full length of him seated deep, her ass flush to his thighs.

"Cody." She bit the sound in half. "God, you fill me."

"Stay there a second." He could feel her pulse around him, the obscene rightness of being inside his stepsister. "Just feel it."

She rolled her hips in a small circle, grinding her clit against the base of him, and a tremor ran through her thighs. Then she rose. The drag of her around his cock was almost too much, slick and gripping, and when she sank again he thrust up to meet her without meaning to. The bunk creaked. Both of them froze, listening. Footsteps passed in the corridor and faded. Annika's eyes met his, bright with the risk and the want, and she started to move in earnest.

Her sleep shirt was bunched above her breasts. He closed his mouth over one nipple, and she gasped into her wrist. Her pace deepened. She rode him to the root, the wet sound small and filthy in the dark. Cody gripped her hips harder and thrust upward, meeting her, the angle punching a stifled moan out of her throat. Sweat gathered at the small of her back. The bunk was hot, the air close, and every upward drive dragged a fresh slick sound out of where they joined.

"Quiet," he breathed against her breast, "or the whole car hears me fucking my stepsister."

"Harder," she whispered. "I want it harder."

He drove up as she came down, a hard rhythm the thin mattress could not absorb. Her hair curtained his face. She rode him harder, ass slapping softly against him, gripping on every withdrawal. He felt her clit grind down. He slid one thumb between them and circled it, firm, and her whole body jolted.

"Right there," she hissed. "Don't move your hand. Fuck me just like that."

He thrust up, thumb working her, the taboo thrill sharpening every nerve. She was close. He could tell by the way she clenched, by the broken rhythm, by the way she grabbed his wrist and held his thumb exactly where she needed it while she fucked herself down onto him.

"Not yet," she panted. "I want you behind me too. I want to come with you like that. Switch. Please. Now, before I can't."

He nodded, barely able to speak. She lifted off him with a wet sound that made his cock jump, and turned. Then she was on her side, back to his chest again, one knee drawn up, and he fitted himself behind her the way the bunk had been forcing them all night, except now there was nothing between them.

He guided himself back in. From behind, spooned tight, the angle was deeper, tighter, her ass pressed flush to his hips so he could barely withdraw. He sank in one long stroke and stayed buried, arm banded around her waist, mouth at her ear.

"This okay?"

"Yes. God, yes. Move."

He moved. Short thrusts, the only kind the space allowed, each one grinding deep. The train rocked and added its own rhythm, shoving him into her on the curves, and Annika reached back to grip his thigh and pull him closer, as if closer were possible. Her cunt fluttered around him, greedy, and the narrowness made every inch feel like more. He covered her mouth with his palm when a moan broke loose, and she licked his fingers, then nodded hard so he would know the muffling was wanted. He kept his hand there, gentle and firm, and fucked her in slow deep strokes that turned harder when she pushed back to meet them.

"You feel so good," he whispered. "So fucking good. My stepsister, taking my cock like you were made for this berth. For me."

She moaned into his palm. Her hand found her clit and rubbed, fast, and he felt the flutter start. He thrust harder, the wet clutch of her pulling him to the edge. The taboo of it intensified every sensation, the heat and the scent of her and the fact of who she was in his arms.

"I'm close," he managed. "Annika. I'm gonna come. With me. Come with me."

She nodded frantically against his hand. Her fingers flew on her clit. He drove in deep and held, grinding, and she broke. Her cunt clamped down in long pulsing waves, a cry caught in his palm, her whole body seizing back against him. The grip dragged him over. He came with his face in her hair, spilling inside her in thick pulses while she milked him, both of them shaking and stifling the sounds until they were left gasping, still joined.

They stayed like that while the aftershocks faded, his cock softening inside her, her fingers loosening on his thigh. He eased his hand from her mouth and she turned her face, seeking, and he kissed her. Soft. Unhurried. A kiss they had not been allowed. She smiled against his mouth.

He slipped out of her gently and reached for the discarded sleep shirt to clean the worst of the mess from her thighs and his stomach. She let him. Then she pulled his arm back around her waist and fitted herself into the curve of him, bare skin to bare skin, the wool blanket dragged up over both of them at last. The train's motion had not changed. It felt different anyway. Lulling. Honest.

"We're a mess," she whispered.

"Worth it." He kissed her shoulder, then the corner of her jaw. "I don't want to go back to pretending tomorrow. I can be careful in front of them. I won't be careful with you when we're alone."

"Good." Her fingers laced through his over her stomach. "Because I already decided. Whenever we travel, we share a bed. One berth. One room. I don't care if we have to lie to the booking desk. I want this. I want you. It feels more right than all the years we spent not touching."

He held her closer as the car swayed, their sated bodies heavy, sleep pulling at the edges of the dark. The taboo had not vanished. It had simply stopped feeling like a wall.

Annika spoke against his throat, drowsy and sure.

"Next time we book the single on purpose, will you still fuck me like you couldn't wait another four years?"