It's Tess's turn

"Okay" you say, breathing heavily, directing your instruction at Tess. "Now you taste."

Tess smiles and gives her sister a knowing look and a nod. You're certain they both prepared themselves mentally for this, at least as much as a person could be prepared for such a thing. And you wonder, if perhaps you should have requested something a little less expected. No, you think, one thing at a time. Besides, now that you've seen your girlfriend taste her sister, watching Tess return the favor is really very much what you want to see.

That this is even an option is still ridiculous and nowhere near making sense in your mind.

Katie returns Tess's smile, and you hear her whisper. "alright!" with excitement.

Tess cocks her head. "What?"

"I want to see how you do this. After all, you're the expert." Katie smirks playfully.

"I am not an expert. Don't say that." Tess gives her sister a little shove.

"Yeah? How many girls have you tasted?" Katie asks. You just sit and watch, enjoying the sisters' playful banter about tasting pussies.

"Just four" Tess says with confidence.

"Well that's four more than me." Katie quickly responds. "So you're the expert."

"Excuse me..." Tess perks up. "That's three more than you."

Katie nods. She knows Tess has a point, and at that she decides to shut up, lean back and let her sister go to work.

The whole thing is amazing. You watch as Tess's eyes gaze at her sister's body, slowly glossing over from familial affection to lust. She places her hand on her sister's chest, above her shirt between her breasts, and just lays it there. Katie takes a deep breath. It's calming her.

Then Tess gets to work undoing her sister's pants. While Katie chose to just slide her hand in, Tess is going through the trouble of finding out what her next meal looks like. The sound of Tess unbuckling Katie's belt fills the room and your ears. The sound of her popping open the button of Katie's jeans echoes like thunder. And then she's pulling the jeans down off her hips, off her legs. And her lacy black panties too.

And before you know it, Tess is right there, inches away from her sister's, your girlfriend's wet twat. Katie takes a deep breath. You can't imagine how anxious she might be.

You never thought you would enjoy watching someone else eat out your girlfriend, let alone another girl, let alone her sister. Your sex life has gone from very good to indescribable in just a few moments.

And Tess leans in, not hesitating, going down between her sister's thighs.

"Wait!" Katie says, halting her sister's movement. Is she changing her mind, you wonder? You wouldn't blame her if she was. And you decide it'd be okay if she did. Even putting on this much of a show, is more than you could ever have hoped for.

"What?" Tess asks her sister, somewhat annoyed.