With Lara, to think was to act, so she pulled away from her brother’s loving, lustful caresses and clambered to her feet, giggling as yet more of his spunk ran out of her gaping pussy and down the insides of her thighs.
“Finny, you dirty, dirty boy!” she mock scolded him, “Look what you did to me, I’m all spunky, you naughty man!” she grinned, her eyes sparkling devilishly. Finn wasn’t in the least fooled by her words, getting to his feet and pulling her to him by her pert little buttocks all in one move.
“Don’t come the innocent, Sissy, you loved it!” he grinned, and Lara pulled his head down so she could kiss him.
“Of course I loved it, I never said I didn’t!” she giggled into his mouth, then gasped as he slid his finger all the way into her tight anus all over again.
“I promised you I was going to fuck your arse tonight; get ready for a real bum-stretching!” he grinned happily, his eyes glinting with innocent lechery as he thrust his finger in and out of her. Lara writhed at the sensations swirling around inside her, need for him topmost in her mind. She kissed him as she wriggled against him, grinding once more against his rapidly erecting cock
“You filthy, dirty beast!” she giggled, “My mum warned me about boys like you! Now you’ve done all those nasty things to me, I suppose you want some more?”
Finn leered happily as he squeezed her bottom even harder, pulling her cheeks apart to make her gasp.
“You betcha! We haven’t started even started yet, and the night is young! Come to bed, Sissy, you dirty girl, I want to play!”
Lara kissed him and led him back to the bed, watching as he climbed on and turned to her, an expectant grin on his face. Lara grinned back, rummaging in the bedside cabinet for a moment before finding what she wanted.
“I need to clean up a little, wait for me, Finny, I’ll just be a minute!”
With that, she hurried into the bathroom, from where came the sound of the shower running briefly. A few minutes later she re-emerged, naked, her makeup restored, and a waft of floral shower soap surrounding her.
“I needed that, baby, now we can really play!” she grinned wickedly. Finn’s already solid erection grew even more pronounced, almost painfully so, as his gorgeous naked sister climbed onto the bed next to him and planted her lips on his, taking hold of and squeezing his rigid cock as she did so.
Finn kissed her back even more urgently, his hands roaming over her, squeezing and pulling apart her taut buttocks, his fingers slipping into her pussy and sliding teasingly over her taut little pucker. Finn grinned as his fingers slipped easily into her anus, the little pucker slick with lubricant, more evidence that she wanted this as much as he did; good girl, she thought ahead!
At the thought of what they were preparing to do, his need to have her overcame any reservations or lingering doubts, and so he rolled her onto her front and positioned himself above her, his almost supernaturally hard cock brushing her labia. Lara gasped as he slid forward, slowly slipping himself back into her damp pussy, to pump in and out of her. Lara gasped and moaned as she pushed back against him, helping him slide deeper into her with every stroke. She reached behind her, blindly groping for his face. Finn captured her fingertips with his lips, making her smile even as she pushed herself backwards onto him.
“Jesus, baby, you’re massive, I don’t know how I got all that inside me!” she gasped.
Finn responded by nuzzling her neck as his hands slid around her torso and cupped her breasts, his fingers gently squeezing her taut nipples, wringing a groan from her. He slid back out of her and pulled her to her knees, then held her hips as he slowly pushed back in to her, savouring the feel of her heat enfolding him again.
“Ooooohhhhh God, yesss, like that, Finny, just like that!” moaned Lara, delightful sensations swirling and chiming through her as her brother’s talented cock once more filled her completely. Finn was again enthralled at the sight of his cock pumping slowly between her round, delectable buttocks, the twin translucently pale globes gently bouncing and jiggling as he thrust into her.
As he pumped into the beautiful girl, his eyes were drawn to her pink little pucker, the tight creases of her tempting little anus slick with a layer of lube, calling to him. Almost without conscious thought he slid a finger into that tight ring, hearing her faint gasp as he pushed into her all the way to the second knuckle. He pumped her bum hole in time to the thrusting of his cock inside her pussy, enjoying her gasps and soft moans as he pleasured both holes, and then he spotted the tube of lubricant gel where Lara had left it on the bed.
Lara gasped in sudden loss as Finn pulled out of her completely, pulling her back on her haunches so she was leaning against him, her eyes closed as her chest rose and fell with her heavy breathing. Finn cupped her firm little breasts as he kissed and nibbled her shoulders and the back of her neck.
“Are you sure you’re ready for the next part, baby-girl?” he murmured, feeling Lara squirm against his solid erection, feeling how hard and ready for her he was.
“Do it, Finny, I’ve wanted this for so long. Shove that big cock inside my bum; I want you to bugger me, baby; I want you to fuck my arse and fill me up!” she whispered, reaching behind to hold and squeeze him, making him groan softly.
“Just do it slowly, Finny, please, don’t… don’t go too hard, don’t hurt me!” she murmured, and Finn pulled her against him, wrapping his arms around her, letting her know he’d never hurt her.
“If you want, we can do this another time, baby-girl; I don’t want you to do this just because you think I want it; if you’re scared, we can stop now; I don’t need this!” he told her as he nuzzled her, kissing her neck, her earlobes, the side of her mouth as she turned toward him.
“Thank you baby, I know you mean that, but I really want to try this; all I could think about all night was you doing it to me like that. Love me like that, Finny, I really want you to!”
Finn turned her almost all the way round so he could kiss her properly, then picked up the tube of gel and spread a thick smear along his finger. Lara gasped and giggled as he rubbed the cold gel around her crinkled little anus, her giggles giving way to sighs as he slowly pushed the gel into her, sliding his finger in and out to spread it in a little, feeling her gradually relax enough for him to slide a second finger into her. Lara began to push back against him as he pumped two fingers into her, her breathing becoming quicker as her arousal climbed.
Now Finn gently urged her back onto all fours, spreading a last finger of lubricant around her anus before squeezing out a large smear and slowly spreading it around the head of his swollen cock. He could hardly contain himself; at last, he was going to live the dream; he was actually going to fuck his beautiful sister in her arse!
With the tip of his cock slathered in lube, he rose up on his knees and shuffled up behind her, positioning himself properly, and gently pushed the head of his cock against the tight creased pucker of his sister’s creased little anus. Lara murmured apprehensively, and Finn stopped pushing immediately, concerned that he was hurting her.
“No, Finny, don’t stop, please, just… slowly, please?” she murmured. Finn leaned forward and gently kissed her on her back, promising her again that he wouldn’t hurt her.
Once again, he gently pressed the head of his cock against her anus, prodding at her with tiny movements, each little thrust slipping his swollen head incrementally further into her, listening to the little noises she made in response to his micro-thrusts, fully prepared to pull out at the first sign of distress.
As he pushed forward Lara began pushing back against him, forcing his head further into her with each push. The feel of her anal ring squeezing him was almost unbearable; with that came so many different, conflicting needs; he wanted to plunge into her, he wanted to stay still and savour the heat, he wanted to keep feeling the amazing compression as she slowly, slowly took him in, but most of all, he wanted to bury his cock in her depths and feel the heat of her anus as it squeezed and rippled along his entire length.
Lara seemed to be feeling the same things; she maintained a steady push back against him, and Finn, not knowing what else to do, pushed forward, until, suddenly, her ring relaxed and he slid all the way into her.
“Oooh God, Finny, slowly!” gulped Lara, her ring clamped tightly around the base of his cock, pushing back against him even as she begged him to go slower.
Finn was in a world of his own; he couldn’t believe he was here, with Lara, the girl of his dreams, with his thick cock shoved all the way up inside her tightest hole. He looked down, seeing the glistening ring of her distended anus wrapped around his shaft, exactly as he’d always fantasised. That alone was almost enough to make him blow his load there and then, but he bit it back, determined to do to his sister what he’d promised: fuck her arse properly and fill her with his spunk.
He came back to the real world slowly, the sound of Lara mewling softly every time he moved slowly dragging him back to reality. As he started to withdraw from her, Lara gasped out loud, her ring tightening around him all over again.
“Oh God, yes, do that, that feels so good, yess Finny, oh my God, oh my God!” she stuttered as he slid nearly all the way out of her anus. For some reason, it was almost as difficult pulling out as it was going in, but Finn wasn’t complaining; it felt fucking amazing! Lara seemed to agree, if the way she pushed back against him was any indication. As he slid back into her, the way a little easier now, Lara jerked and trembled at the feel of being filled so completely again.
Every time Finn withdrew and slid back in, Lara gasped and pushed herself harder against him, until they were pumping against each other, Finn pounding himself into her arse, and Lara flexing and jerking as incredible sensations roared and battered through her, emanating from her tight anus where Finn’s thick cock was doing such a good job of fucking her almost senseless.