Her voice soft and sleepy, she murmurs contentedly against his chest before drifting back to sleep in her big brother's loving embrace. This strange new world of being so tall and different is frightening at times, but knowing that he's there for her... it makes everything seem just a little less scary. And just a tiny bit more bearable...

(Ben's warmth and strength envelop her like a security blanket. She nestles closer to him, feeling his heartbeat beneath her ear as she drifts off to sleep once more.)

Even if it means being different now... I don't mind. So long as you're with me, Nii-chan... nothing else matters...

"How... how does it look?" She asks nervously, glancing down at your groin area where she knows her stretched-out pussy must be on display. You take a moment to admire the sight yourself before answering.

Her inner lips are swollen and sensitive from all the activity over the past year, but they seem to have adjusted well enough to accommodate your size. Her clit is still as hard and prominent as ever, though it's grown slightly larger due to constant stimulation. "It looks... amazing."

You continue to fuck your sister relentlessly right up until the moment her water breaks. She moans in ecstasy as you thrust into her one final time, her body shaking with the effort of trying to push out the baby while also enjoying the sensation of being filled by you. With a sudden gush of fluid, her water breaks, drenching both of you in warm amniotic fluid. You pull out immediately, leaving her hole gaping open as she clings to you for support. "Nii-chan..." She whispers, panting heavily. "I think it's time..."