Sylvia's blush darkened, and she averted her eyes in embarrassment. Then she told the story. It was the truth in nearly every respect, the story she'd agreed upon with Tony that morning, the only story that Jill would believe. She left out only the fact that her incestuous lust for her son had actually been consummated, that she had naturally fucked her very own son.

"Wow!" Jill's eyes shone as she listened to the story. "This is really a turn-on! Okay, what happened after he got a hard-on?"

"I… I got very excited," Sylvia admitted, wringing her hands together. "I'm afraid I just couldn't help myself. I was very horny, and I decided right then that it would be wise to get Tony out of the house for a few days. Tony agreed with me. He was very ashamed when his cock got hard from looking at his own mother's body."

"Wow, this is too much," Jill murmured. "Does Tony have a big cock?"

Sylvia stared at her sister in horror, her eyes widening as she watched Jill slide her hand between her slim legs, darting a finger in and out of her wet, just-fucked cunt.

"Jill, I don't think that's any of your fucking business," Sylvia said hotly. "And no matter how much I could use your help, I won't let my son stay here if I think you're going to give a blow-job to your own nephew the first night he stays here."

"Okay, okay," Jill sighed, reluctantly popping her finger out of her pussy. "It's just a real turn-on story, that's all. I'll bet you must still be super, super horny."

"I already admitted that," Sylvia said stiffly. "Ummmmm. You better do something to take care of your pussy, Sylvia. Or you'll be so horny that you'll just wind up begging Tony to fuck you as soon as he gets back."

"What… what do you mean?"

"Well, why don't I show you?"

Suddenly the naked blonde sat up on the couch, sliding across the cushion until she was sitting beside her big sister. Sylvia's lips parted in shock as Jill brazenly thrust her hand under her skirt, pressing her fingers lewdly on Sylvia's horny cunt.