She wants to go down on you as you fuck

"I mean, I'm going to suck and lick you two while you fuck." Nikki says as if it's the most normal thing in the world to say to someone, let alone her cousin and his girlfriend.

You and Katie exchange glances.

"I didn't realize that was what was going to happen." Katie says with a nervous laugh.

"Is that a problem?" Nikki says, pulling off her fishnet stockings and her underwear, exposing her soft, bald, slit to you and your girlfriend.

"No." Katie answers. "Why are you naked?"

"Is that a problem?" Nikki repeats.

"No." Katie shakes her head intently. She doesn't mind. She just seems overwhelmed by the situation. "It's just that, no one has ever watched us having sex before." She's jumping wildly from one train of thought to another.

"Are you worried that you're doing it wrong?" Nikki jokes. Katie goes to answer than freezes as Nikki approaches her. Nikki gently but intently places her hand on Katie's crotch, leans in and speaks very intensely. "I'm going to give you the best night you've ever had. I'm going to eat you out in a way no one has ever dared. But first I need you to strip and climb up on his hard cock. Does that sound good to you?"

"Very." Katie's breath has been taken away. You notice that Nikki's hand has started to squeeze her crotch.

And you decide it's probably a good time for you to start to undress. You pull your shirt off. You undo your pants. Nikki helps Katie pull her shirt off. You need a moment to take that in. Your cousin just helped your girlfriend pull her shirt off. Then her bra, exposing her breasts. Nikki greets them with a smile and a nod of approval.

You pull down your pants and boxers all in one move. Your cock is out. But neither girl has noticed it yet. Nikki is too busy undressing Katie, and within moments, she's naked too.

All three of you are naked in your living room. Totally, completely naked. So much bare flesh to look at. And not just anyone's, the two girls who you've coveted in your life more than anyone else. Naked. Next to each other.

This is about to happen. Just one natural question to ask.

"Ummm, what position do you want us in?" Katie asks your cousin.