Dawn woke up to an arm around her. As she wriggled, she found that Joseph had rolled over and was holding her against his massive chest. She could feel his abs pressing into her back, and his pecs above her head, as he spooned her against the curve of his warm body. Between her legs, his morning wood stuck out its full foot and a half, so wide it felt like sitting on a tree branch. She reached out to touch the throbbing shaft, and a rumbling laugh shook her body. Joseph was not asleep.
"Morning, lil' sis," he said. His voice was low and sent shivers down her spine. "Don't worry, you can feel it. It's not going to bite."
Cautiously, she ran her hands down it. The veins were so thick, and she could smell the precum that was belching out onto the blankets. The arms around her tightened with a moan from Joseph, before letting her free. Dawn scrambled away, to look at her mammoth brother as he straightened.
His head had grown a little, and taken on a slightly bulbous shape. His brain power must have increased too, and Dawn shivered as she wondered what the changes to his personality were like. His eyes, however, were dark and intelligent. They studied her with a gaze far older than he was supposed to be. Joseph lifted himself to his feet and stretched his full 8-foot frame. "I've been thinking, Dawn. About what happened last night. And I want to say I'm sorry."
"For what?"
"For fucking you without your permission. I know now that you were encouraging some sex, with that handjob you gave me, but I should have asked before I fucked you so hard in your delicious, tight little pussy," Joseph said, with a feral grin. He seemed to be taking delight in the retelling, and Dawn couldn't say she wasn't enjoying it. "But I won't apologise for giving you the best sex you've ever had, and I won't apologise for ruining you for every other man in the world. No one could ever compete with this, after all."
He spread his arms out and turned in a circle, showing off every inch of his huge body. Dawn bit her lip as she soaked in every muscle and grotesque vein over his body. He grinned, seeing the dampness in her underwear. "I want to fuck you again, Dawn. I want to fuck you over and over until you overflow with my hot, musky cum. I want you to beg for my cock, and I want to hear you scream as you take every inch of it, okay?"
"Joseph... you know what you're asking, right?" She rubbed her legs together, easing some of the pressure. "No one will approve of this."
"Oh, I know, sweetheart. I know." He snaked an arm around her waist. Thick, inescapable. She was trapped in his embrace. "Do I look like I give a shit what other people think? I want you to be mine, Dawn. Please say yes."
"Like there was any other answer," she muttered back. Joseph smirked and pulled her against him, crashing their lips together. As they kissed, his other hand deftly snatched the ointment from her pocket. They broke apart.
"Now, would you like me to rock your world before or after I grow?"
Dawn gulped.