One more step.

Her eyes go wide, and in that moment Ellie lets out a moan, her teeth clench together as Vi pushes a finger into her, simultaneously with the swirling of her tongue. Her eyes flutter open again, staring at my veiny, enlarged cock. I stroke it slowly, pretending to 'prepare' myself for Vi. Her lip quivers as she licks her lips, her eyes going up and down my length, no doubt mentally comparing me to Matt. She mouths the phrase, "Oh my god," as she pushes her head back against the bed. With her attention back on Vi's ministrations I get down onto a knee and grab a handful of her ass. She pushes back against my hand, and I bite my lip as I find her slick entrance and slowly slide myself in.

"Oooooh Fuck Yessss, that's the dick I needed." She moans out into Ellie's pussy, prompting her to look back up at me as I start to move my hips into my girlfriend. Ellie watches in rapture as I lift my shirt slightly, my lower abdominal muscles flexing with each thrust, the sound of skin slapping filling the room. Vi delays Ellie's orgasm, needing to take breaks to moan and push back against me, Ellie can only watch, turned on by Vi getting fucked into her pussy. The girls' moans get louder as Vi starts to become more wild in her eating. The **** of my thrusts causing her to finger fuck Ellie even more intently. Ellie reaches up and pinches her nipple, unable to focus on me thrusting into Vi, or Vi's face between her legs.

"H-h-how does it feel?"
Vi looks up from Ellie, I look at Ellie, Ellie stares down at Vi.
Vi smiles and slams her ass against me, dragging me deeper inside her.
"Fucking. Amazing."
Ellie's eyes go wide.
"There's no other feeling like being fucked by a big dick Els."
Vi punctuates her sentences by diving back in.
"He reaches so deep inside."
"Every thrust stretches me."
"I can feel, every ridge of my mans beautiful cock."
Ellie breathes in, too aroused to exhale, her eyes staring directly at me, at my body.
"I could never live with another cock. It's just so fucking big and hard."
Vi starts to struggle herself, the smell of Ellie's pussy, the cock inside her, the words she's saying. It's all starting to get to her.
"Els! I'm going to cum from my boyfriends big cock! He makes me cum so quick! I'm so fucking full. Oh my god! My God! ELS! FUCK!"
Vi wraps her arms around Ellie's thigh and squeezes her legs against the side of her head, her pussy clenches as she folds inwards to herself slightly, I bury myself deep and hold her as she orgasms around me.
"Fuck! G-God Vi!"
Ellie pushes the back of her head against the bed as she silently orgasms. Save for the tightest of squeaks forcing its way through her throat. Her hips shake as her jaw twitches, her silent orgasm rocking her entire body. By instinct, Vi had dived back into Ellie and lapped at her like mad, Vi had inadvertently edged Ellie, and now we were seeing the results.

Ellie continues to orgasm, Vi continues to move her tongue across her clit, I'm honestly a bit worried that she's stopped breathing. Ellie's eyes are still closed as she reaches up and grabs a fistful of her hair, her other hand gripping the blanket, her fingers clenching and unclenching. She finally exhales, the slightest undertone of a moan, her hips finally fall, and she bites her lip as her head falls to the side, she pants heavily before opening her eyes back up as she feels Vi move away from her.

Ellie's expression is unreadable. She hasn't moved, but she watches, still breathing heavily, still naked. She watches as {gf] glides her tongue up and down my cock, her hand wrapped around the head as she holds it upwards, her nose pushing against the underside of my shaft.
"Aaaaha." Vi lewdly exhales as she drags the full width of her tongue up from my balls to the head of my cock.
"You taste so good."
Vi looks over at Ellie, who silently watches. Vi gags ever slightly as she forces more and more of my length down her throat, the bottom of her tongue poking past her lips as she expertly moves her head up and down me.

"What's better, baby? My pussy or my mouth?"
I grin as she fills her mouth again, her nose pressing against my abdomen as she momentarily takes my full length inside her mouth.
"Call me greedy."

I push her and hold her head down as she chokes and gags, I let her pull her head back and she exhales and giggles as she glances over at Ellie again, kissing the side of my cock as she stares at Ellie. She looks away from her and back up at me.
"Cum daddy. Show Ellie how much a big dick like yours can cum. Show her how you reward me."

Thank god she said that could barely hold on any longer. I pull my cock out of her mouth and pump it a few times before I bite my bottom lip and let my seed shoot and sputter out onto her face. Vi sticks out her tongue and quickly moves up to catch the sticky liquid that hangs from the tip, she greedily licks my cock and for good measure bobs her head down to coax any stragglers out.

"What did you think, Ellie?"
Ellie finally comes to her senses. The lust that is on her face is quickly replaced by the intense, embarrassed crimson. She grabs her shorts and quickly pulls them up again, slipping her shirt back on. She refuses to look at either of us as she messily pushes her belongings into her bag, she grabs her jacket in a frenzy and mutters out, "B-b-b-b-b-bye Vi, I have to go, sorry." She rushes to the door and slips out.

"Fuck."
Genuine worry fills me.
"Did we scare her off? Do you think she feels guilty?"
Vi stands up and walks into the bathroom with a shake of her head. I hear the tap running and she walks back out (still nude) and sits cross-legged on the edge of Ari's bed.
"Nah, it'll be fine. Remember what she said?"
I glance at her as I clean myself with a tissue.
"She said, 'Matt said it was okay.'"
She continues, "She wanted a lesbian experience, Matt being a man was 'okay' with it. Because all men are the same."
She fixes me with a playful glare, I put my hands up innocently.
"So she got that. Luckily. You were here."
She stands up and slowly walks over to me, swaying her hips, her hands reach out and lean on my shoulders as she leans over my body.
"She got a good look at this magnificent cock of yours. She'll be back. I saw the way she stared at it."
Vi straddles me and slowly lowers herself down, enveloping me in her warm wetness once again.
"I hope you're ready to fuck the nerdy girl."
She moves her hips.
"And I'll fuck the nerdy boy."
I groan and grab her hips.