The brothers were waiting at home for Karen to arrive the next day. In his bedroom, Jesse was feeling anxious and had been touching his bigger (but still small and thin) 4 inch baby dick. It had grown, but it hadn’t matured like he thought was supposed to happen. He kept telling himself that when Karen had finished giving Andy blowjobs, he would soon get back his thick, heavy, hairy beast of a cock, and then it wouldn’t matter what gross baseball bat his baby brother was packing. He fondled himself and his four inch boner tingled with sensitivity.
“Karen’s going to make me big again,” he groaned. Maybe he could convince Karen to suck Andy off more than six times and give him the manly cock he deserved, leaving his brother as some sort of long penis-ed freak. The thought of his brother being humiliated for having a huge dick made Jesse more aroused, and quickly after, he squealed. He hadn’t had an orgasm in a while, and he fell asleep, dick in hand, as the smallest squirt of cum oozed out of his baby dick onto his smooth crotch.
Karen arrived to the house a few minutes later, and Andy met her at the door. He was wearing really big sweatpants, and the outline of his eleven inch monster cock instantly made Karen wet.
“So, Andy, ready for more?” she teased, and was rewarded when the outline in the boy’s pants got fuller and thicker before her eyes. “Let me check in with your brother and then we can get started.”
Karen walked up to Jesse’s bedroom, knocked on the door, but there was no answer. She opened it and made a face of disgust. Jesse was passed out on his bed, pants off, and between his big, manly thighs was his small, thin, hairless dick. She was hoping after the growth last night that it would look more appropriate, but instead, it was just…sad. His hand was cupping his shrunken shaft, and there were small drops of cum on his fingers. Had he really just passed out from tugging on his little wiener? she wondered in disappointment.
The thought made her think of his little brother, and the image of that long, thick, hairy cock on his otherwise small and hairless body. The difference in their sizes made Jesse look pathetic, while everything about Andy’s change tickled Karen’s size queen tendencies. She’d been disappointed that she had only seen Andy’s crotch briefly the night before, but with Jesse out of commission, she had an opportunity.
“Let’s go to your bedroom, Andy,” she said, coming down the stairs. He took her to his room, where she giggled at the kid posters of superheroes, and the cartoon bedspread. Andy pulled on his pants, but stopped when Karen started to take off all of her clothes. He’d never seen a girl naked before, and he blushed at seeing her bra.
“You’re getting naked?” he asked, confused. “Why?”
“Because using my mouth was fun last night, but I think we can do more now that your brother’s not going to interrupt us.” She unhooked her bra, and Andy gulped. He tore off his t-shirt and then, as Karen licked her lips, Andy pulled down his sweats to reveal his thick hog. It sprung up, flicking some drops of precum out that made Karen shudder. There it was, in all its eleven inch glory, looking so out of place on his boy body, but that made it so much more exciting to her.
She tossed off her panties and then sexily strode to the side of his bed and beckoned him with her finger. There was a moment where she thought about trying to shove that massive member into a condom, but the Madam had told her that Andy was to climax internally, and maybe that would interfere with the spell? Whatever…at this point, she was starting to care less and less about what Jesse wanted.
“Come here, Andy,” she grinned, and sat back on his bed. He nervously climbed on top of her, unsure of what he was actually supposed to do. Karen ran her hand along his shaft and was delighted at the copious surge of precum coating the entire dick. “It feels like you’re all ready, aren’t you?” she smiled, teasing him by touching all over his cock. Andy closed his eyes and nodded furiously. “Well then, give it to me, big boy.”
Karen helped direct Andy’s cock into her pussy, and she gasped. He was so much bigger than she’d ever had, and way bigger than his brother. Andy’s body moved on autopilot, pumping in and out, as Karen moaned louder and louder. Andy let out some boyish grunts that spurred Karen on more and more, fulfilling her size queen desires and the mismatch of this boy and his adult cock.
“It’s coming…” Andy grunted, working his little hips.
“Give it to me, Andy! I want your cum!” Karen yelled, not caring if Jesse could hear from his room. Andy’s eyes shut tight as his cock spewed rope after rope of hot semen deep into his big brother's girlfriend. Karen didn’t want it to end, and she looked up at the boy’s face as they both climaxed together. Her pussy clenched around Andy's cock, and she milked him until it was all done. Andy felt on top of her, feeling her boobs press into his chest. He opened his eyes and was about to say something, when both he and Karen’s eyes widened. Andy’s cock was growing two more inches inside of her, and Karen’s mouth opened with a gasp.
"Oh geez, it's...so much bigger," Andy whispered. He sat up on his knees, and his cock slipped a little out of Karen’s pussy, but she gripped his arm.
“Please, don’t pull out yet,” she said. Her face was blushing and she couldn’t stop grinning. This was a dream come true for her. A cock that could literally fulfill all of her size fantasies. “I want to do that again. Right now. How about you?”
***
Jesse woke up from his nap, feeling groggy, he went to rub his eyes awake, and was disgusted by the dried drops of cum on his hand. He remembered jerking off, and then sat up. His eyes widened when he saw that his dick was back to its normal size. It was still hairless, but he’d worry about that later. He was big again! He got up and jumped for joy, feeling himself, not even realizing what Karen and Andy had done for him to grow this much.