"Yes, you can."

Mattie whimpers excitedly as she pulls your pants down, she can't avoid letting out a high-pitched gasp as your erect cock springs out, almost hitting her in the face. "It's... just as I imagined..." She purrs before immediately pressing her cheek against your shaft, slowly resuming to hump the pillow. "Beautiful..." She mumbles under her breath, starting to smooch every bit of skin she could find with her pinkish, delicate silky lips.

"Gods, Mattie..." You groan out, throwing your head back in pleasure. You can't believe the little slut down there making out with your cock is your sister Mathilda... the sweetest, seemingly most innocent girl in town...

After almost a dozen of sweet kisses, you can't take it anymore; you grab Mathilda's neat, brown hair and pull her face out of your dick. She looks up at you with a silly, aroused expression, panting heavily and probably wondering why don't you let her continue. "Get that pillow out of your legs and lay on your side." You grunt a command, she quickly obeys.

You remove the rest of your clothes and big-spoon the young girl over her sweaty bed, grabbing one of her shapely legs and holding it up in the air; your cock head aligned with her dripping wet, virgin pussy. "I've been saving myself for you, big bro... fuck me as hard as you want, I can take it~." She exclaims, lost in pleasure and excitement. You will, but it's best to go gentle at first, you don't want to make this painful.

Gently kissing her neck, you slowly start to push your hips forwards, sinking your cock into the extremely tight slit. Your sister grits her teeth and clenches her fists at the strange sensation. "It will stop hurting soon, Mat..." You tenderly soothe her, doubling your calming kisses on her neck.

Your words quickly prove true as the pain starts to turn into pleasure, your sister's body beginning to relax, loud moans coming out of her parted lips. "Good girl. That's my good girl..." You praise her, this seems to fuel her second orgasm, the leg you are holding kicking in the air as her little deflowered pussy clamps violently around your cock. The only things that come out of her mouth are incoherent babbles, but you can understand some words like 'thank you', 'don't stop', and 'I love you'... It seems like you can go deeper now...

With a firm grip on her shaky leg, you continue pounding into Mattie's pussy from the side. Her warm, small body pressing itself against you and her wide hips moving in sync with your own. "I love you too." You exclaim, thrusting balls-deep inside her, reaching her untouched cervix and triggering a third orgasm out. This time, you are joining her.

You empty your balls inside the convulsing pussy, shooting load after load directly towards her womb. The steamy room smelling of sex and echoing throaty grunts and moans. This is perfect. You can't believe you were so dense that you couldn't see how bad the two of you wanted this... "D-don't pull out... I want to feel you go soft inside me..." The girl dazedly out purrs between ragged breathing. You smile, letting her leg down and pulling the blankets over your connected, naked bodies.

"...How long have you wanted this?" You ask after a few seconds of silent afterglow.

"I... do you remember, some years ago, when dad wanted to teach you how to hunt? ...when you came home, crying because he made you kill a deer... I thought it was the most adorable thing ever, I started to have a little crush on you..." Mathilda talks, her voice getting more drowsy with every word. "Then, when... he died... you took care of me... and the crush turned into love..." She finishes, quickly passing out. She seems exhausted but really happy and satisfied at the same time. You plant a final kiss on her neck, holding her body closer and drifting to sleep with her.