"What is this? An inquisition? I'm tired. Just let me go to sleep," Franny said, climbing up onto her bed and deliberately waving her naked ass in front of her sister's flushed face.

Lily watched as Franny lay down naked on top of the covers. Then the older girl reached out and grabbed hold of Franny's shoulder, pulling her around to face her.

"Tell me! You led him on again and then refused to fuck him, didn't you?" she asked.

"That's not the way it was at all. I made him feel good, Lily," Franny said softly.

She and her sister were so close to each other now that Franny's naked tits were brushing against the fabric of the older girl's blouse. Franny moaned softly, feeling her nips beginning to harden.

"What do you mean, you made him feel good?" Lily asked thickly, her eyes traveling down to her sister's tits. "Did you let him fuck you finally, or didn't you?"

"Oh, no, I couldn't do that! I'm a virgin!" Franny cried, as if horrified at the thought of fucking with her brother or with anyone, for that matter.

"Then what? What did you do to make Brad feel good?" Lily asked, her pussy moistening.

"I sucked him off," Franny whispered, leaning closer to her sister.

Lily instinctively moved closer to Franny, too, their bodies touching now.

"You sucked him off? Did you like it?" she asked lewdly, her grip tightening on the younger girl's shoulder.

"Oh, sure, I loved it! Mmmm, I can still taste his delicious cum. It was so creamy and hot. I loved it! But then you should know all about what it's like to suck Brad off, Lily. And to fuck him too. I know that you and everyone else in this family have been getting it on with each other for ages now. I guess I'm the last holdout. I'll suck but I won't fuck."

"That's just my point, you bitch!" Lily spat out between gritted teeth. "I love my brothers and my father! And I love making it with them. I've stood by for too long and watched you driving them all crazy with that sexy body of yours and then, when the moment of truth arrives, you always cop out! You never let them fuck you! Why? It's wrong to tease them like that!"