Oh, yes, now he's about to do it, she thought when his hand began exploring her cunt. She eagerly spread her legs and felt his fingers slip and slide around her pussy.

"Oh, Bobby," she moaned.

He found her clit and rubbed relentlessly as she jerked her hips wildly. "Can you take two fingers, Sis?" he said, shoving two fingers knuckle-deep inside her twat.

"Yes!" she gasped, raising her ass and clutching his fingers with her cunt. "Three. I can take three."

When he shoved a third finger up her gash, she bit down on his upper arm. Soon he was finger-fucking her so hard she soared toward orgasm.

"Oh, Bobby, don't stop!" she cried, thrusting herself at his fingers. "Oh, God, you're making me come again! Oh, God, fuck me, please! Oh, God, it's so good!"

She tried pulling him down on top of her, but he held back. She turned on her side and faced him when he stretched out next to her. She greedily reached for his prick.

"Take it out," she said in a strangled voice. "Please, take your cock out."

Finally his shorts were off and she found herself holding his cock. My God, I've got my brother's cock in my fist, she thought with a flash of panic.

Bob saw the look in his sister's eyes. He knew he had to relax her before they went any further. It was obvious she was feeling guilty as hell.

"It's all right, Sis," he said, covering her hand with his as she squeezed his dick. "It's right and good and you're beautiful. Honest."

But despair flooded the young woman and she hid her face in his chest. "What if Mother finds out?" she said.

He held her close, noticing she hadn't released his cock. That was a good sign. "You know Mom fucks around a lot," he said, patting her hair. "It's time you had a little fun too. Remember? You promised you'd make changes in your life."