I set my hand over her right cheek. Not squeezing, just… laying there against her soft, warm butt-cheek. Oh god, it feels so amazing under my fingers.
My sister smiles and turns her head, looking at me.
"Feeling like helping yourself out, little bro?" She chuckles, shaking her butt beneath my palm. "Help yourself out. I don't mind."
"Y-You really don't?" I gape, my hand still hanging on her cheek.
"It's just a little touch. It's not like you are going to take your big, hard cock and shove it deep into your big sister's wet cunt."
I start on the couch as my dick grows harder, straining against my pants. She laughs as I feel it brush against her nape.
"Just teasing you, little bro. A little grope is fine."
"Are… are you sure?"
"Hey, you are my precious little brother, aren't you? Who am I going to offer this ass to if not you? Have fun, it feels good to get groped anyway. But don't get too creative, alright?"
"Y-Yes." I can't believe it. I know it's going to be just for tonight. I pray the ring can deal with her memories as well or tomorrow morning there will be hell to pay.
I start groping her butt in earnest, my fingers going deep into her flesh as she groans appreciatively.
"This is better than that movie," she moans, leaning into her touch, biting her pouty lip. "That's it, get deep into it. Why don't you massage my butt to your heart's content, little bro? it's there for you after all."
"I… alright."
Is it my imagination or did I hear the echoes of a faint laughter all around?
But I am not going to lose, it's just a little groping.
Just like my sister said.
"Hhmmm, that feels so good," she nods as I lean towards her back, using both hands to grope her butt, enjoying the way her peachy skin wobbles. She's so pliable. Her ass is fantastic. It doesn't matter it's my first time playing with a girl's ass.
Luckily I am not going to go all the way with my sister. This is just… just practice. One day I will get a girlfriend and she will marvel at how good I am with groping, that's it! That's all I am doing right now, just… practice.
"Hmmm, that's so good. You are so nice to me, little bro. It's the least I can do."
I jolt, my dick growing stiffer at her words.
"You should feel yourself. So embarrassed at your big sister's choice of words. That's enough, by the way," she slaps my hand off her butt. I already miss it.
But then she sits on my lap, her big soft butt pressing against my dick, still safely held in my trousers, and she turns to look at me, wrapping her arms around my neck.
"Let's see how good you are up top. Don't get weird ideas, this is just to make myself feel good after a long day of work."
She did not go to work today, but neither of us points that out.
She straddles herself and pushes out her chest.
"Hmm? Come on. Don't you want to know how big sister's big titties feel?" She grins, inviting me for another grope, and all I can do is to give in and move my hands against her chest, starting to squeeze her breasts. I can feel her hard nipples through the fabric. It does not feel like her butt. Her breasts feel a bit firmer and a bit… granular? I couldn't express it in any other way. She leans forward, into my touch.
"Hmmm, that's right. Enjoy my breasts, little bro. Just… ah!... don't play too much with my nipples, you idiot. Just… be gentle. Enjoy yourself."
I very much do! Her breasts are big enough to overflow my palms, and they are even a little heavier than I expected. They feel so good even through the fabric. I would love to touch them bare, but something tells me that would set the ring's power at risk. So I just enjoy her little moans of pleasure as she bits her lip, shudders when I press a little harder against an areola or against her nipple.
It feels like I have my sister to myself tonight, like her body is mine to enjoy and to make her feel like I want to.
Maybe this ring can be a good idea…
But no!
If I keep using it, my soul will be forfeit, and that's exactly what the Morningstar wants. This is just a once-time thing, and only because she was the closest girl to me, not because I harbour any fantasies towards my sister!
I keep squeezing, though. I really feel like I needed that. Touching her rounded breasts makes me feel at ease with the universe.
She whines in pleasure and that sends small shocks of pleasure through my dick.
"Hnnh… alright, that's enough. Enough groping your big sis," she says and I do obey, withdrawing my hands. Is a disappointed look what I see on her face? I'm not sure, but it looks like she expected me to… insist.
"Did you enjoy big sister's breasts?"
"I… uh, yes, very much. Thanks!" I feel so stupid and embarrassed.
Never again! I'm going upstairs and taking off the ring and I will never wear it again!
Still… feeling those boobs was amazing.
"Don't get used to it," she chuckles, laying once again on the couch and putting her legs on my lap. "I know how tiring it can get to be a growing boy. You know you can count on your sister, can't you?"
"Yes." Even without the boobs, listening to my sister showing me some affection like this is just what I needed. I smile at her and she smiles back, lending her hand for me.
"No matter what happens, you know you have only one big sister. Keep that in mind."
That… starts to sound a little bit like the girls this morning, but I decide not to worry too much about it.
We keep watching the movie for a few more minutes, but then she falls asleep for good and I decide to stand up and leave her one couch, covering her with a blanket. I feel like copping one last feel off those boobs, though.
They wobble beneath my hands and I can't stop grinning like a madman. They feel so incredible.
One send-off to this madness with the ring and the devil-girl.
I walk upstairs, already feeling like my hands are cold and empty if they are not groping my big sister's breasts.
But that's in the past anyway. As soon as I slip into bed I'm going to take the ring off and all this will just be a happy memory.
And as I slip beneath the blankets, I can still feel the ring on my finger.
"Come on," I whisper. It's time to get rid of it. No matter what happened today, I can't go on like this.
It's just not right, and my soul is definitely, literally on the line. I can't risk it.
I take hold of the metal band and slide it off my finger.
There.
It's done.
I don't feel anything different at all. It's just… things are the way they used to be.
Now. I can still put it on.
But that would mean accepting that my soul is forfeit… and I really don't feel like doing that.
Plus, now that I am laying alone in the bed, the thoughts of involving my very own sister into my fantasies feels worse and worse. This is not what I am supposed to do or to think!
She is off limits, period.
Maybe tomorrow, the girls will find me a bit more interesting anyway…
I slip the ring into the closest drawer and decide to shut the lights off and go to bed.
I put my hand against my chest and I imagine that's my soul, still firmly in place.
I will protect my sister.