A mischievous purchase

A funny idea enters your mind.
"Hey, Vee?" you ask.
"Yeah?"
"Ollie wanted to check out a book at the library, and she needs me in person to do so, with my ID and all."
Ollie looks at you with a confused look on her face, but she doesn't say anything.
"So, I was thinking," you continue: "that maybe you could lead the delivery men back to the flat, and Ollie and I could get the book in the meantime. You do have a key now. Just put the old bed in the storage room. It's completely empty, so it should fit. The key to the storage room is on the kitchen counter."
Vanessa flatly shrugs: "Yeah, alright. Dinner takes some time to cook anyway, so I can start doing that when I get there."
Vanessa gets in the delivery van and it drives back to the apartment.
Ollie looks at you.
"What was that all about? There's no book I want to check out of the library." she asks doubtfully.

A mischievous grin forms on your face.
"There's a sex shop a couple of blocks away from here."
"W-what?"
"You wanted a vibrator, right?"
"That was m-mostly a joke."
"Mostly?"
"Don't take everything I say seriously."
"Okay. If you don't want one, that's fine. I just wanted to give you the opportunity to get one without having your sister around to make a scene out of it. You're an adult, and I think getting a vibrator is a decision you should be able to make without your sister telling you what you can and cannot do."

Olivia gets a serious face and mulls it over for a few seconds.
Then she asks: "Astrid, do you have a vibrator?"
"Uhm..." you stammer: "There's one in the lingerie drawer at home... towards the back."
"Well," she replies forming one of her, at this point, trademark smirks: "can't I just use yours then?"

Have you caught Olivia's fever or is everything getting a bit hotter all of a sudden. No, calm down. This is what Ollie does. She tries to bait you with sexual overtones and imagery to win the debate and avoid answering the embarrassing question truthfully. You've tried being reassuring, you've tried being sarcastic. There is only option left.

"Sure, but I just thought it would be more fun for us to do it together simultaneously rather than taking turns."

You felt a bit dirty saying that, and not really in the sexy way... although also a little bit in the sexy way. You feel a bit like you're exploiting her, but she started it, and she'll learn to get out of the kitchen if she can't stand the heat. The deliciously sexy heat.
It's very clearly working. You got her this time. Ollie's freckles gets harder to spot as her face gets redder. She looks down, clearly trying to avoid eye contact. She knows that what you just said was just you using the same tactic that she was, but in the end she sighs in defeat.
To **** an answer out of her, now that you have the chance, you ask again:
"Do you want me to buy you a vibrator, Olivia?"
You keep looking at her, even though she is trying to look away from you. Finally she sighs:
"...kinda."
Good enough.

Sex shops are awkward. That's just a fact of life. There is a young female clerk behind the counter, wearing fairly revealing cleavage-heavy clothes, selling you stuff, that everyone involved knows is going up your vagina at some point, and that you know that they know, and that they know that they're being way too forward about this stuff, but you know that they also don't care.
The clerk instantly irritates you due to her clothing. You are very certain that it's just a cheap marketing ploy to get you horny and to buy more stuff... and you hate that it is working. She also welcomes you with a very sensual voice that makes her sound like the long lost daughter of Bob Ross, and that you are visiting her store while she is recording an ASMR video.
This absurd level of sexual teasing is super shameless, which unfortunately also makes it a lot hotter, and now you have kinda regretted getting in here in the first place, but you did not go through all of that effort talking sexily to an eighteen-year old girl just to give up and leave now, so you power through it.
The walls are decorated with plastic dicks. Luckily, due to your sexual orientation, it's not doing much for you.
It seems Olivia has the same mindset as she instantly goes to the least phallic-looking vibrators. Clean, straight, uni-coloured, plastic rods that just round off at the end with no semblance of a male glans. Like a pegleg for a small pirate robot. Or a wizard's wand from the future. The type was easy to determine. Now it's just about the colour. The amount of colour variations rivals one of those wall paint colour catalogues. You are pretty sure there are at least ten different shades of purple members here.
Olivia looks at you: "What colour is your vibrator?"
"It's black."
"Then I'll get a white one. For contrast, you know? Like kind of a yin and yang thing... I think."
For all of her vast knowledge, Taoism does not seem to be Ollie's strong suit, but you appreciate the cute sentiment nonetheless.
You buy the damn dong, and get the dickens outta there, finally released from the succubus' lair.

"Now we just need you to get that book." you sigh.
"Wasn't that just a cover story?" Olivia asked. Heh, a book being a cover story.
"Yeah, but if we show up back in the apartment without a book, your sister will find it suspicious. We'll just quickly pop in the library, and you'll grab the first book that looks vaguely interesting to you, alright?"
"Sure!" Ollie agreed with a cheerful upbeat voice.
You go to the library and Olivia immediately scours the "recent releases" shelf. She hands you the first book she finds, and you tell her that while you like the way she thinks, checking out a non-fiction book about female genitalia will just raise more suspicion than it would alleviate. Finally she finds a book about the history of sexing animals. Eh, close enough, you guess. You check it out of the library, and get home. You're starting to understand why Olivia has such an interest in biology.

You put the vibrator in your back pocket and cover it with your shirt to smuggle it inside the apartment without Vanessa seeing it. You have double checked that there are no batteries in the vibrator, just to avoid a goofy sitcom-like scenario. Vanessa greets you, and you immediately duck into the bedroom. You find Olivia's lingerie drawer and hide her new second best friend (after you, of course) in the back, under some panties.
While you are there, you check out the new bed. It's big. There's juuuuust enough room for it. You got a whole set too:
There's a mattress, a bed frame, three pillows, a duvet, a decent amount of sheets... wait. Duvet. Singular. As in, one big duvet that you will all share. Even though it was you who filled in all the information, you are fairly confident that this is in someway, somehow, all Ollie's fault, because it definitely cannot be yours, right? Because what kind of a bonehead would you be to make that simple of a mistake? You laugh nervously to yourself.

Goddamnit.

The girls don't seem to mind though, as after a relatively uneventful dinner and evening you all snug into the bed comfortably. For some reason you get to lie in the middle. You don't really know why. You don't think it was a conscious decision made by anyone. Vanessa was apparently pretty pooped, because she has fallen asleep in three minutes time.
Olivia turns to you and whispers:
"Hey, Astrid?"
"Yeah?"
"Thanks."
"Hey, it's alright. Vibrators are a norm-"
"No, not that. Well, not just that."
"Then what for?"
"For not treating me like a child, and to let me explore these kind of things. Vee always treats me like a kid."
"Don't you think she is just being overprotective?" Well, Ollie can also be pretty childish, but this is not the right time to bring that up.
"I know, it's just annoying."
"Hey. She has been **** to be very grown up for so long in such a horrible situation. I think she did it, because she was scared of losing you. It was easier to boss you around a bit to make absolutely certain she could keep control over the situation, so she could keep you safe."
"Yeah..."
"But just think, now you are back in a stable and safe life. Now she doesn't have to feel like that she should treat you like a stern mother. Now she can go back to being your dear sister. Just give her a bit of time to adjust."
"Yeah, you're right."

A couple of seconds pass.

"Hey, Asta?"
"Yeah?"
"Can we, uhmm.... can we snuggle for a bit?"
"Of course, Ollie."
You hold the girl in your arms. Your bodies are pressing against each other. Olivia nuzzles her head into your chest, right below your chin. As you feel the warmth of each others bodies, you both gently fall asleep.