SWAP! Vanessa Time!

Olivia had barely exited the room before Vanessa stepped inside. She is completely naked.
"Ready for round two?" she asked.
"Oh come on, I've just had sex with your sister." you answer.
Woooow.... that did not come out right. Well, it technically did... but... it's just... you know.
You are about correct yourself, but Vee just looks at you adoringly, and gives you a relaxed smile.
"You sure did. Ollie was absolutely radiating, when she exited the room. It also sounded like you guys were having a hell of a time. And I just wanted to thank you for taking so good care of her."
"Yeah... That's really kind of you. I'm just a bit tired."
"I understand. That's why I just want you to lie down, and I'll do all the work, alright?"
You nod. Vanessa always wanted to please. It's something that makes her an easy target to take advantage of, but it's also one of her best assets. Always so generous, always so altruistic.
And right now you're really fucking knackered, so you gladly take her up on the offer.

"You look stunning, Astrid." she says quietly.
"Well... I probably looked better a little while ago. Now my boobs are flopping about everywhere, and my hair is a mess, and I'm pretty sweaty."
"True, but that still has a nice look to it. Very hot, very naughty."
"You really are a lot more confident when it's about sex."
"Well, if there is one thing, I'm not shy about it's my body. It's a lot of effort to make it look like this."

And by this she meant toned. If she were to present that in an old folk's home, she would be responsible for several heart attacks.

"I want to see the results of your hard work up close." you grin.
She laughs: "Smooth."
"Not as smooth as my untoned belly. Well, it would be smooth if I weren't so sweaty."
"Sweat is sexy."
"I'm glad you think so, because there is no getting past it."

She crawls over you, her gorgeous face and lovely blonde hair inching close to your face. You give her a deep kiss. You are starting to get used to the whole kissing thing.

She moves down to your breasts, almost exactly like you were doing to Olivia.

"I think breasts might be my favourite body part." she says wistfully.
"They're all yours if you want them." you offer with a grin.
She grabs them both. She gently pulls them, weighs them in her hands, and lightly teases your nipples.
She then sticks them in her mouth. She licks all over it, making your already sticky breasts more sticky.
She makes a few slurping sounds, as if she is really savoring the rich and fine taste of your mammaries.
She spends a couple of minutes just massaging your breasts. Both with her hands and with her mouths, and you find it increasingly hard not to let moans escape your throat.

"Now, lay on your side, and I'll make us both feel good."
You do as she asks, having a slight inkling on exactly what she has planned.
"I thought you would go easy on me." you whine a bit.
"Yeah, well. Plans change." she replies with a smirk, as she docks her body in between your legs.
Soon after you can feel her hotness move ever so slightly against yours. The anchor has been cast and she is now successfully parked tangled with you. You arch up and use your left arm to support yourself, as she does the same.

"Ready?"
"Not really."
"Too bad."

She begins to grind her pelvis into yours, and pleasure starts to wash over you. She is doing all of the work though. She energetically keeps thrusting and slamming your clits together, and you are mostly trying to not fall backwards in an over-the-top and hilarious manner, while simultaneously trying to not pass out from the pleasure and the tiredness that from you having had sex for at least an hour at this point. Still, you must persevere. You have to bite your tongue and knuckle up and resist giving up. This means a lot to Vanessa, and you need to be there for her on this one.
Sweat beads down your forehead as you get a bit of second wind and actually start to rhythmically move against Vanessa. Vanessa's moans fills the room. She is not as loud as her sister. It's more a under-her-breath kind of moan that accentuates and represents both her stamina and her sheer persistence. It almost feels like she sees this as a competition. One she is handily winning. It's also a bit unfair considering she hasn't had sex with her sister before doing this.

Vanessa's breath becomes more ragged and her moaning becomes more disjointed. You're guessing she is getting close. Not that you really know. She is not very talkative when she is focusing on sex. That's fine though, neither are you, although... you've heard somewhere that if someone has called 911 and are bleeding out, the emergency line always ask them to keep talking as a means to not pass out and potentially die. This situation feels kinda like that. Due to her closeness Vanessa picks up speed, and you just can't keep up, which means your thrusts become asynchronous and you sometimes slam into each other like a lesbian hi-five. It starts to hurt a bit, but Vanessa isn't slowing down; she just keeps going like a trooper, who just heard an Independence Day speech and is fighting for her country to make this tired brunette give her an orgasm.

She finally accomplishes her mission, and if a big shudder, she grabs your shoulders and holds you close as she jitters in climactic rapture as our tongues entwine once again. Part of you feel bad about not arriving at a climax yourself, but part of you wants it to be over at this point. You're fucking drained.

Vanessa lies back down, taking long slow breaths. Inhale. Exhale. Inhale. Exhale. Inhale. Wait for it. Waaaait for it. There we go, exhale.

"You didn't cum." she states plainly.
"That's fine." you state: "I came earlier with Olivia."
"But I wanted to make you orgasm as well." she says a bit defeated.
"You don't have to. I still loved it." you reassure her.
"No, I'm making you cum, and that's final." she says as she sits up.
"Vee, please, I'm really tired." you beg.
"Don't worry. You just have to lie down, and I'll do all of the work."
"Yeah, you said that twenty minutes ago, and now I feel like I'm dying."
"I mean it this time. This time it's just about your pleasure."
"I don't know Vee..." you trail off.
"Please?" she begs.

You breathe in. Oh man, you can't say no to these girls. "Fine." you sigh.

Vanessa lies down besides you. Her eyes once more gazing into yours, her breath gently swiping the hairs on your neck. She kisses your cheek as her hand slithers over your belly down to your vagina. It welcomes a finger gleefully. You begin to pant a bit, as she strokes your insides. She roll over you a bit, lying with her butt in the air, creating a mountainous landscape in your bedroom, half covering you as she starts to slightly peck at your lips. You don't really know what to do with your hands. Your right arm is trapped underneath her fantastic body, so you decide to use your free left hand to cup her face as you innocently kiss. It welcomes another finger. She starts to set the pace up a bit, and you start moaning heavily.

"There are no person I love as much as you, Astrid."
"Are you sure?" you ask. You don't really know why. It seems like a stupid thing to ask, but you are starting to see something in her eyes that had been hidden away. Like a puzzle slowly starting to reveal its pattern. Despite all of this suffering, all of these speeches, and conflicts, and all of these kisses and lovely promises, all of these platitudes, none of them empty, this girl was still hiding something.

"What do you mean? Of course I am. I am making love to you right now." she says, completely stopping all operations. You hear a small hint of hesitation.
"I don't know why I said that to be honest. I mean, you still love Olivia, right?" you ask. Bringing in Olivia will hopefully defuse the situation a bit. It usually does.

Not this time, however. She tenses up. She looks at you in complete disbelief. You have to backpedal and you have to do it fast.
"I'm sorry. I don't know what I am saying. I am getting tired." you say, pretending not to have noticed anything. She relaxes and resume her fingerwork.
"It's okay." she says: "We're almost done."
It welcomes another finger. It's starting to become hard to breathe properly.

It doesn't take long for you to roll your eyes back and let it all out. Another orgasm has been registered in your name.

"I love you Asta."
"I love you too, Vee."

And with that you can feel your consciousness fading.