As Brian lowered his head and kissed her gently on the lips, he felt his cock spring to life. He slipped his tongue between the girl's lips and opened his mouth wide. He pulled her closer to his body, feeling his cock press against her pain, sending jolts of pleasure throughout his body. And then that magical moment was interrupted.

"Can I watch?" Beth asked, her expression happy and excited.

"No you can't!" Brian said, pulling away from Susan. And then he added, "Where's Dad?"

"Playing golf. Won't be home for hours!" Beth answered with a broad wink.

"Good," Brian said, leading Susan by the hand toward the stairs. "We'll see you later," he said to his sister.

"Are you sure I can't watch?" Beth called out.

"Real damned sure."

Beth snorted out in mock anger. "You'd think it would be okay, since it was my idea in the first place!" she said to the departing figures, and then placed her hand on her moist cunt, her mind deliciously wondering what Susan would be experiencing in the next few minutes.

Susan's teenage body trembled with excitement as Brian led her into his room and pushed her down on the bed, then undressed her. He then took off his clothes and lay beside her, placing his arm around her shoulder.

Susan looked down at Brian's cock and gasped. "My God!" she uttered, "It's huge!"

Brian didn't answer, afraid to say the wrong thing. He kissed her gently on the forehead, running his mouth down the side of her face and caressing her neck with his wet lips.

"Is this going to hurt?" Susan murmured. "Your cock looks like it will split me in two!"

"Don't worry about it," Brian answered, his voice soft and low. As he placed his right hand over her pussy hairs, feeling the hot, moist entrance of her cunt. He glided his finger gently against the opening, feeling her clit harden beneath his touch.