"Ohhh, Bill," Jody sighed, squirming beneath his incestuous caress.

"This isn't why I came in here," Bill mumbled, feeling dazed and disoriented – and more excited than ever before in his life.

"Why'd you come in my room?" Jody asked faintly, not really caring. All she cared about at that moment was the feel of her big brother's hand rubbing first one of her tits, then the other.

"I heard you yelling and carrying on, and I just came in to see if you were all right," Bill explained.

"Oh, I was just fine, Bill," Jody said with a grin. "You just heard me coming, that's all!"

"God, Jody, you were coming?" Bill gasped, capturing his sister's nipples with the thumbs and forefingers of both hands and pinching them lightly.

"I sure did, Bill!" Jody chirped, getting off on the stunned but turned-on expression on her brother's face. "I fucked my pussy with my fingers until I made myself come. That's why you heard me yelling. It's just a good thing that you and I are the only ones whose bedrooms are upstairs."

Bill groaned as he pinched his sister's nipples again, harder this time.

"Yeow! That hurts… but it's great!" Jody cried. The more erotic pleasure her brother gave her, the guiltier she felt, still believing incest to be wrong. But she repeatedly told herself that what they were doing together was really okay because it wasn't like actually fucking one another.

With another groan, Bill leaned over and gently brushed his sister's lips with his own. Jody moaned and she eagerly let her lips part. She teasingly touched her brother's tongue-tip with her own.

"Ungh," Bill groaned as his tongue darted out to meet Jody's.

Bill felt as if he were in a trance. Just like his sister, he had been taught that incest was wrong, and he struggled against the natural primitive urges which swirled through his loins. But it was no use. His incestuous lust for the sexy young girl was growing stronger by the minute, and he felt weak and powerless in its grip.