At Galatea's apartment again, the scene you walk in on is -- in retrospect -- unsurprising. But somehow you're surprised all the same.
On the bed, Galatea has her face between Cerise's legs, and Cerise has her hands tightly gripping the back of Galatea's head. She grunts and humps Galatea's mouth. "Eat me. Eat my fucking cunt. Oh my god... that's it..."
They're so into it that neither of them notice you coming in.
You debate whether or not to interrupt, but the decision is made for you as Cerise happens to glance your way in her ecstasy. Her eyes go wide. "Alabaster-!! What the fuck! What are you doing here!"
She backs off of Galatea's face, her legs kicking wildly and looking for purchase. She finally gets herself up against Galatea's headboard, and pulls the sheets up over her lower half. Galatea, on her stomach, wearing a shirt but no bottoms (of course), crawls forward and hugs Cerise's legs. Galatea peers up at you as well now, waiting to see what you'll say, and doesn't bother trying to make herself decent.
"I have a key," you explain. "I let myself in."
"Freak!" Cerise cries.
"Freak. Sure. When you sit underneath me and watch me fuck a boy you dressed up in a maid costume, that's perfectly normal, perfectly healthy. But I happen to walk in on a lesbian camshow by accident, and I'm the freak."
She tosses a bottle of water from Galatea's nightstand at your head. You dodge it. "Weren't you and Gal just supposed to watch some anime tonight?"
"we did..." Galatea says happily. In the pale light of her computer screen, as always the only illumination in the room, her face is shiny; covered in Cerise's cum.
"I guess you're preoccupied," you say. "I was gonna take you home, but..."
"Preoccupied!" Cerise says. "Big words for a guy who comes over here smelling like a French brothel! How many people did YOU fuck tonight, huh?"
"I'm surprised you can detect that over the clam bake you've got going on in here," you say. "Did you spend ALL night sitting on that poor girl's face?"
"I haven't cum in over a year!" Cerise says. "I have needs!"
"That's fine. I'll leave you two alone if you want. But... given the history..." You tilt your head, bend your knees a little so you're more on Cerise's level where she sits. "Are you sure you mind me being here?"
Cerise is indecisive. Surprisingly it's Galatea who offers this one up: "i don't mind..."
You reach out, with halting motions that offer Cerise the opportunity to shout you down, tell you to fuck off, but she doesn't. She lets you pull the sheets down from her legs. In the low blue light you can see that she's sitting on a wet spot. Her pussy was was drooling the whole time, even despite the interruption and the arguing. A year of having no sexual release really did leave her in sexual overdrive.
Galatea is already pawing at Cerise's thighs and trying to pry them apart, her eyes on the prize. You wondered whether there was something romantic between the two of them but you had no idea their relationship had ever gotten to this point. The minor sting of seeing Cerise with someone else passes quickly; you can appreciate the sight of a girl as admittedly cute as Galatea licking your sister's cunt. As Galatea settles in again for another round of cunnilingus, Cerise uncertainly plays her fingers across Galatea's head as if petting her, but her eyes never break contact with yours.
"I hope you're not 100% lesbian now," you muse.
"I'm as lesbian as you are ga-- ahhh--" Cerise can't finish that thought as Galatea elicits a shudder of pleasure from her that cuts the sentence off.
You get up on the bed sit Indian style, watching contentedly. Galatea's eager mouth is making a sloppy mess of Cerise's genitals. This impossibly shy, mousy girl is uninhibited when it comes to servicing a cunt. She runs her tongue back and forth from the top of Cerise's clitoral hood all the way down to her asshole, no hesitation at any point. She happily swabs her tongue around the inside of both of Cerise's juicy holes. Despite having cum less than an hour ago, it has your cock quickly hardening.
"Enjoying it, pervert?" Cerise demands, looking over at you with a grin.
"Of course," you say. "I'm gonna join in."
You give Galatea's ass a little smack. Muffled, she squeaks.
"You eat each other out -- have you ever used toys on each other, too?"
"Hmm, sometimes," Cerise says between moans.
You spread Gal's cheeks now and peer at the little puckered rosebud of her asshole, as pale as the rest of her. "Ever played with her ass?" You ask.
"Once or twice..."
You spit. With a thumb, you smear it over Galatea's lower hole. She tenses, obviously a bit afraid of what comes next, but she isn't going to say no to you. It's Cerise who takes Galatea's face in her hands, pulls her up, lets her breathe. Cerise says: "is this okay for you?"
Galatea thinks for a moment. The nod she finally gives is enthusiastic and needful.
"You are such a darling," Cerise says. She kisses Galatea, tastes herself on her lips. And then she directs Galatea's head downwards again. She can't get enough of Galatea's mouth.
You get Galatea up on hands and knees so you can mount her properly, like the bitch she is. You're going to make her feel this one all the way in her guts. Cerise watches, hand on her cheek, through half-lidded eyes. You stand on the mattress, bend your knees and squat above Galatea's waiting ass.
"Alabaster..." Cerise gulps, "can I just say --"
"What?"
"I missed seeing your cock."
This is the only encouragement you need. You drive your cock forward, against the spongy resistance of Galatea's hot little asshole. The lubrication of your spit and her own cum is barely enough to allow you entry. You have to push as hard as you can and even then it's slow going. You sink in by milometers, with gritted teeth.
Galatea is grunting and struggling in her own breathy way. Cerise doubles down on the petting and encouragement. "Good girl... good girl... you're so good for me..."
"She is," you admit. "She's good..."
Galatea goes rigid, like being electrocuted. These words, from you, are the first and only nice thing you've ever said aloud to her. Cerise's bad habit of treating her decently is rubbing off.
Galatea's ass is so tight that even when you've gotten yourself inside it, it's still hard to actually fuck. "Relax," you tell her. "I can't fuck you if you don't relax..."
Cerise seems to get an idea. She spins around, gets on her back, and slithers underneath Galatea -- face directly below the point where your cock is wedged into her. Galatea has separation anxiety from Cerise's pussy it seems, and practically dives to get her face back into your sister's muff. Like this, they've wound up in a 69 position beneath you.
Cerise returns the favor and suckles sweetly on Galatea's carnation pink cunt. With a free hand, she masturbates her, too. Galatea's tiny mewls and coos signal that it's having the intended effect. And like magic she's loosening up enough that you can actually screw her at a reasonable pace, one that feels good on your turgid dick.
"You like that position, don't you?" You ask Cerise. "Getting right up close while I fuck someone..."
"Mm-hmm," she admits, her mouth full of Galatea's sopping pussy.
You piston in and out. Occasionally your dangling nuts slap against your sister's forehead, but that doesn't bother her, so it doesn't bother you.
Galatea manages to pull herself away from Cerise for long enough to plead to you: "please choke me sir"
Cerise's brow furrows, confused by this new dimension to the relationship as much as you still are -- this "sir" thing -- but she won't let that bother her right now, either. She rolls with it, smiles at you and says: "Yeah, Alabaster... choke her..."
Majority rules. You reach down and wrap your hands around her delicate throat. It's not the first time. Galatea almost gags from the force of it. Firmly, you press down, to make her bow her head again, to continue eating Cerise. You're not going to deny your sister the use of Galatea's mouth just because Galatea wants to enjoy getting choked like the dizzy cunt she is. She'll have to lick Cerise out whether she's got an air supply or not.
The noises Galatea makes are almost inhuman, a choking, sputtering, dazed grunting as you and Cerise work her over. Galatea's asshole is shuddering around you, clenching and unclenching, as her body reacts to the hard use. Cerise brings her off again and again, sucking and rubbing her. Galatea's a real squirter: you can actually hear the force of it spattering against the mattress and Cerise's face.
It's too much, watching this dumb slut cum on your sister's face, and with a deep growl you let loose with a load of cum. You deposit it into Galatea's ass without any warning, and she practically seizes as your cock balloons, and pulses, and seeds her. Sighing deeply in satisfaction, you pull out, hard as you can. Galatea's now-ruined asshole dribbles your cum out of it, to join hers on Cerise's face. Now there's a sight you've missed, too: your sister getting plastered with your sperm.
You sit back and enjoy watching the two of them eat other. Without the pressing need for release yourself, you can focus on really choking Galatea the way she likes -- the way she deserves. Straddling the two of them, knees on either side of Gal's back, you tighten and loosen your grip on her neck at random, enjoying the reactions it draws from her. When she seems to be really losing it, you let her go, slap her back into consciousness. Each time she draws shuddering, gasping breaths, and says in the loudest voice you've heard from her: "Thank you sir!"
Over the course of the next hour you choke her back and forth from the edge of unconsciousness as she and Cerise ride out uncountable orgasms all over each other. You're happy to be of assistance.