"Have you been with any other of my friends?"

Katie's interest seems only to be growing. Her face is apprehensive, half jealous, half aroused. You see the goosebumps on her naked body perk up, as it sits there next to her sister's naked body. Her sister who is about to drop a bombshell on her.

Tess opens her mouth to speak, then closes it again, as if she's thought better of it. But the room is thick with anticipation. She knows she's going to have to spill out the truth. You wonder what she could be thinking. Is she thinking that, considering her owns sister has just taken a mouthful of her nipple followed by her juicy kitty, that she might as well owe her the truth.

"I slept with Abigail." Tess admits. You've met Abigail. A pretty, skinny dark haired girl with tattoos and a pierced eyebrow "And Carrie" Tess adds. You've not met Carrie. "And then Carla..." Tess is clearly taking delight in watching her sister's face flutter between shock and delight as she admits all this. "I didn't sleep with Carla. But I screwed her brother. And I made out with her sister.... not at the same time though."

Katie responds with a big, deep breath. She's taking it all in. Then she starts to nod. "You sure it wasn't at the same time?"

Tess shrugs, trying to read her sister's face as she learns all this. "I suppose I wouldn't have minded. At the time I thought, you know, two siblings at the same time might be a little too..."

"Crazy?" Katie jibs.

Tess smiles shyly, or fake shyly again. She licks her lips. You wonder if all this chatter instead of action is making her wonder why she's not yet tasted Katie on her lips.

But you still don't mind. Two sisters spilling their wild sexual histories to each other is more than enough to keep you entertained, and quite hard.

"Are there any friends of mine you haven't fucked?" Katie asks, almost seeming ignoble bringing the dirty word into it.

"C'mon... I'm not that bad." Tess says, her right hand rubbing her left arm above the elbow, maybe genuinely nervous this time, but in doing so, squeezing her breasts together pleasantly. "It's just a few girls. It's not that slutty."

"I dunno... it's pretty slutty." Katie adds, maybe trying to cut a little bit. After all, she's just found out that three of her friends, including her best friend, and a handful of other people she knows have all had the pleasure of pleasuring her sister before her.

Tess turns her head to you. They haven't forgotten you're sitting there watching. "Do you think it's that slutty?"

Now there's a loaded question you don't want a piece of.

"One more question.... to prove my point." Katie says. It's fascinating how she's gone from the one on the defensive, subject to her sister's revelations, to the one in control of the conversation. Then again you've seen this happen again. This is how their relationship works. Back and forth and back again. Playful, but maybe a little harsh. It's just... well, never quite in this context.

"No more questions." Tess snips back. You don't have any more clothes to take off, so you don't have any more currency to ask a question."

Then your girlfriend's attention suddenly turns to you. Both Katie and Tess are staring at you now. The indication is clear. Strip for the right asking something about Tess's newly revealed sluttiness.

You just need to think of the right question. Your brain has it narrowed down to about a hundred.