Emily frowned as she entered their room. The beats of Stephanie's dubstep echoed through its walls.
She closed the door, then stood in front of her desk and looked at her bag on the chair, thinking about the phone call she just had. Stephanie must have noticed the change in her sister's mood and turned it down a bit. These days the girl was almost psychic when it came to Emily.
"Is everything all right?" she asked.
Emily looked over to her sister sitting on her bed, laptop on her legs. Stephanie's puzzled face was now almost mirroring her own.
"I'm not sure," Emily replied, "Sam just called. She wants me to come over for another sleepover."
"You're going to go?"
"Sure," Emily said thoughtfully.
"Can I come?"
When Emily didn't respond, she continued, "Sorry, it was just an impulse. I understand if you don't want me there. I won't ask again."
"Steph, I want you-" Emily replied, then froze when Stephanie smiled. She quickly continued, "there. I want you there."
Stephanie continued grinning. Both sisters knew.
"Wait," Emily tried to correct herself, "When I say I want you to come-"
Both girls giggled. Flirting like this was way more fun than it had any right to be.
"I do," Stephanie nodded.
"What?"
"When you tell me to come," Stephanie explained casually, grinning wickedly as she shrugged, "Then I come. Yesterday, remember?"
Emily scoffed, looking away, her gaze falling on the erotic portrait on her desk - a side view of her sister's naked teenage body stretched along the length of the paper. The arm closer to the viewer was lifted, holding the back of her head in a seductive way while her other hand was working its magic on her intimates hidden between her parted thighs. Her face was turned towards the viewer, flushed with excitement. Her eyes closed, mouth open, back arched, bottom lifted, a puddle was forming between her legs, painted with Stephanie's real ejaculate no less. Her whole body was tense and twisted in the beautiful agony of a powerful orgasm.
The scene was incredibly arousing. More than that, it was something positive. Looking at the picture made Emily want to do whatever she could to see it again in real life.
"You gave me permission to come-" the teen started repeating.
"Wait, no," Emily interrupted, "It wasn't a permission. You're not my slave."
Her sister stopped, then added quietly, "Pity, might have been fun, for a day or two."
Emily looked into her sister's eyes until Stephanie looked away. There was a sudden vulnerability Emily found very attractive. She said under her breath, "Be careful what you wish for."
Stephanie swallowed and shrugged, still looking away, "We both know you don't have what it takes."
It sounded almost as though the girl was trying to reassure herself. But if yesterday's session told Emily anything, besides how much she enjoyed looking at Stephanie's orgasms, it was that Emily's words carried a lot of weight with the teen.
Due to her being the older sister, there was a natural imbalance when it came to power in their relationship. Yesterday, their innate sibling relationship expressed itself in the artistic domain, with Stephanie and Emily instinctively assuming the roles of the model and the artist. It was perhaps this power that gave Emily so much more confidence now, compared to her previous relationships.
What would it look like if Emily assumed the dominant role in the sexual domain as well? She did it on Wednesday, unconsciously and only a little bit, by asking for Stephanie's helping hand, then a helping mouth. But that was nothing, compared to what the darkest corners of her dirty mind could come up with. Her heart was beating wildly as she looked at the beautifully innocent teen sitting on her bed. How far could she push Stephanie? What things could she do with this girl? To this girl?
Looking away, she took a deep breath to calm down and come back to the real world. Emily's priority would always be to protect and care for her little sister, maybe even from Emily herself. Time to lighten the mood. She glanced back to make sure the door was closed.
"No Steph, this is just a big misunderstanding," Emily calmly sat on the end of her bed, facing Stephanie, "when I say I want you and I want you to come-"
Emily looked into her eyes and paused. Timing is everything.
"-all I'm saying is I want to lick your pussy until you orgasm into my mouth," Emily explained, trying to keep a straight face. She shrugged, continuing, "I swear I didn't mean anything weird."
Both girls suppressed grins.
"Oh God, sorry!" Stephanie said dramatically, "Here I am sitting, thinking it's something sick and twisted, like spending time together, or talking or something!"
Emily made a disgusted sound, "Talking? To my own sister? Steph, what kind of pervert would talk to her sister?"
They could hardly contain their grins.
Stephanie continued, "I can't imagine the kind of filthy person that would do something like... like talking. I should have known you only meant something perfectly normal and sisterly," another pause, "Like spending the whole night with your head between your sister's thighs."
Emily nodded, "Like all straight sisters do, every night."
Stephanie smiled warmly now, "I'm glad we figured this one out."
Emily smiled back, "Really dodged a bullet this time."
A couple of seconds later, Stephanie said in a calm voice, "OK, so, can you take me with-, I mean, can I come with-, I mean, can I orgasm with you to Sam's place tonight? Would Sam mind?"
A second later, Stephanie added, "That was a bit stupid wasn't it?"
Emily shrugged, "There's no one I'd rather be stupid with."
"And about Sam, I'm not sure. She asked me to-, to orgasm. I'd like you to orgasm with me, but I'll have to ask. On the phone, she sounded strange. Like she really wanted to say something."
"OK. Better check if Sam would mind if we orgasmed to her place together," Stephanie finished, then added with a grin, "Or, at her place."
"I can ask the first question," Emily couldn't hold back her laughter, "the second one I'll leave to your imagination."
--
Stephanie nervously stood behind her sister as Sam used an electronic buzzer to unlock the street door into her apartment stairwell.
This was the teen's first time here, or first time spending any significant time with Sam really. She felt like clinging to her sister, which was exactly the impression she didn't want to make. But before Emily reached the elevator button, Stephanie touched her sister's shoulder, "Em?"
Emily turned to Stephanie, "Hm?"
"Before we go up, thanks for taking me with you."
"No, it's cool," Emily smiled.
In a way, this felt as though they were a couple going to a party. It wasn't true, but the teen still enjoyed being part of big sister's life. Last time, Emily chose to go alone, and it hurt her. Stephanie tried not to take it personally. It was better for Emily to talk to Sam alone, not to drag her little sister along. That's why Stephanie was so anxious that this time, she might be in the way or say the wrong thing at the wrong time.
As Emily turned away, Stephanie continued, "I love going with you, but now I kind of feel like a burden. Is this really OK? Maybe I should turn around and go home-"
Emily held her hands to her own cheeks, gasping theatrically. "After I've called in all my favors for Sam to accept your coming?" She shook her head.
Stephanie couldn't help but giggle.
The older sister continued, "No way, Missy. You're already in, all the way."
"OK," Stephanie nodded, relieved, "But I still appreciate you taking me. I think this fulfills your debt from yesterday's painting session, and you know, also the five to two thing if you'd like."
