"Damn," David mumbled from Carter's bedroom door. He stared at Carter's naked, newly-made-male body with a clear hunger in his eyes. Carter expected to feel an overwhelming desire to cover up. And yet, for some reason, since it was David at the door, Carter felt content. He even raised a sly eyebrow at his step-brother.
"What are you doing over there, Step-brother?" he asked with a smirk on his face.
That broke the spell on David, and he visibly cringed, "Shut up, squirt! You know I hate that." Carter shrugged and turned back to face the mirror. He heard David close the bedroom door. David walked up behind him.
"It's not my fault our dads got married," Carter said. David placed his chin on Carter's shoulder as he hugged him. Memories poured into Carter's head. The pair had grown up as close friends for many years. They had started dating in secret, but the secret was obliterated when Mike and Jeff sat them both down to confess that the two of them were dating. Carter had been stunned into silence, but David couldn't contain his outburst. And thus began the incredibly difficult, but no less rewarding, journey of navigating that the two pairs of father and son were dating their counterpart. Carter went with the flow with overflowing confidence. David was a little more reserved and had more difficulty with it.
David kissed the back of Carter's neck, slowly massaging more and more of his exposed skin. "I don't want to talk about our dads right now." He grabbed Carter's rock hard nine-incher. "This is all I want right now."
Carter leaned his head back to kiss David and moaned, "Then what are you waiting for?"
David smirked. He squeezed and stroked Carter's cock. With his free hand, he kneaded Carter's pecs. He teased and rubbed the nipples, earning another moan from Carter. His free hand maneuvered its way to Carter's firm ass. He continued to pump Carter's cock as he began to run his hand along Carter's crack. It was everything Carter could do to remain standing. He leaned further against David as a finger slowly pushed its way inside his hole. His toes curled with the pleasure.
"Please," Carter whimpered. "Just fuck me already."
David's hands froze, and he leaned in to whisper, "That is what I was waiting for." He released his hands off of Carter's body to strip his pants off. Carter moaned at the loss of physical touch. David positioned his hard cock at Carter's asshole and pushed in. Carter moaned, covering his own mouth to stop from crying out. David kept pushing, and Carter's hole kept taking until the full length was completely inside him. Then David started to pump back and forth.
"Flex for me," David commanded. "Show me how much of a man you are as I claim you as mine." Carter obeyed, flexing his arms into a double bicep pose. The muscles were firm and larger than David's. That's all that mattered in the moment. "Fuck, you're so hot, Carter."
"This... ugh... so... fuck... fucking... good!" Carter moaned. He could feel a pressure building deep inside him. He somehow knew what was about to happen.
"I'm... fuck.... I'm gonna cum," David warned. He buried his cock in Carter's ass to the hilt. "I'm gonna, oh FUCK!" With that, he came. Carter felt David's cock lurch, which instigated his own orgasm. He cried out, no longer caring about being quiet. He came all over the mirror. The two now-lovers leaned close against each other as they rode out the waves of pleasure.
Carter panted and made eye-contact with David in the mirror. "I... I love you, David."
David smiled and kissed the back of Carter's neck. "I love you, too, Carter." He held Carter tightly. He sighed and frowned.
"What is it?" Carter asked.
David huffed and said, "I just wish...