Uhazral's will is clear: it wants Marnie to corrupt her sister. Marnie runs a hand along her plump lips, which are now perfect for wrapping around a man's cock. She isn't enthusiastic about the consequences of refusing the demon. But she doesn't want to see her boyfriend fucking her younger sister either.
If I do this, will they realize anything is out of the ordinary? she asks.
That is up to you, comes the reply. You have the power to make your changes seem as if things have always been that way.
That makes it easier, then. Marnie has already conceived of a plan that will minimize Katie's corruption while still satisfying Uhazral—or so she hopes. She sits down on the couch next to her sister. Katie smiles and squeezes Marnie's arm. Then she takes Marnie by the shoulders and moves her slightly so that she can start rubbing Marnie's back. "Stephen was just talking about how you're working too hard, sis. Mom was saying the same thing. We never see you anymore. And I don't feel as close to you as when you were at home."
"Well, I think I can help with that," Marnie says. She closes her eyes and wills her power to change Katie.
The runes along Marnie's arms glow. Behind her, Katie's hands falter as the girl takes a sharp breath. "Whoa," she says.
"You OK?" Marnie asks.
"Yeah, I was just dizzy for a moment. Where were we? Oh, yeah." And Katie is unzipping Marnie's dress. "Stand up, sis. Let me get you out of these clothes."
Marnie complies. Katie tugs the dress down past Marnie's hips and then husks her of her tights as well, leaving Marnie in only her underwear. Katie pats the cushion next to her on the couch, and Marnie sits down again. Suddenly her sister is on top of her, pinning her to the couch and pressing her lips against Marnie's.
There was no way Marnie was going to make her sister fuck Stephen. She could see in Katie's mind that this wouldn't be an unwelcome event—her sister apparently had a crush on Marnie's boyfriend. But that would have been too much right now. It was enough to alter Katie's sexuality, make her bisexual, and worse still, give her a lust for ****. As far as Katie is concerned, she and her sister make out all the time. It is normal.
Well, it isn't normal for Marnie, but she figures that she can put up with it more than the consequences of disobeying her demon.
Katie's hands deftly undo the clasp of Marnie's bra and slip it down her arms. Soon Katie is kissing Marnie's bare breasts, gently nibbling on each nipple and lavishing it with the attention that she thinks her poor, overworked sister needs to help relax. A free hand slides downwards to start stroking Marnie's labia through the nylon of her black thong. Marnie begins to moan. She hadn't realized it would feel this good.
Behind them, Stephen continues to make dinner as if nothing out of the ordinary is happening. Marnie has willed it so the idea of her and her sister having sex in front of him is just the way things work in her family—it neither turns him on nor causes him to freak out. "Do you want some kale in the salad?" he asks.
Between gasps, Marnie answers, "Sure, why not? Oh—oh yeah, right there, Katie!" she adds, as her sister's mouth presses against her wet pussy. Katie's tongue brushes directly against Marnie's hard little clit, and the 18-year-old seems to know what she's doing. Why wouldn't she? She's been doing this with Marnie for years now. Marnie has so many pleasant memories of the two of them fooling around behind their parents' backs. They enjoyed exploring each other's developing bodies, tasting each other and experimenting with various toys…. What? Where did these thoughts come from? Marnie had altered Katie, not herself! But of course, if Katie remembered making out with Marnie as a normal occurrence, then for reality to be consistent the way Marnie had wanted it to be, then she herself would also need those memories….
Marnie feels the pressure in her body building as she approaches orgasm. With one hand, she grabs Katie's hair and forces her sister's mouth more firmly against her vagina, unwilling to let go. Suddenly it doesn't matter any more whether what she feels or what she remembers is actually "real." All that matters is the exquisite sensation of her younger sister eating her out. Marnie's hips buck and rise off the edge of the couch as she adjusts her angle to help Katie's tongue penetrate deeper into her slit. "Ohhh, yeah. Right there."
Katie redoubles her efforts. She explores the inner layers of Marnie's labia, her tongue parting each pink fold without difficulty, and then returns to her clitoris. Marnie's juices soak the couch cushion as she tilts her head back and shudders. Her orgasm overtakes her unexpectedly, and she leans her head to one side and gently strokes Katie's forehead and face.
Katie gives a naughty smile and rejoins Marnie on the couch. She kisses Marnie gently. "I hope that helped." Then she starts to remove her tank top and shorts. "My turn now."
Oh, no. That wasn't part of the deal. Marnie herself wasn't all that interested in eating her sister out.
You could always let Stephen take care of her, then.
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