Of course not

"Now what should we do next?"
"Wwhhhhh???!!" More ropes. What more could she do to you. There is no way she could tie you more thoroughly than you are now. Oh how wrong you where.
You feel more ropes go over your chest above and below your breasts pinning your upper arms to your body limiting your hand movement even further. She ties it all tight finishing it between your shoulder blades and you think she connected it your elbow ropes but there is no way to be sure. You begin to wonder how the hell did she learn to do all this. Did she do this before? Is she a bondage freak like you? Or is she just a natural talent? Whatever the case you are tied tighter than you could have imagined and she is still not done.

"Are you cold sis?"
"Whhmm? Nmmm." You wonder why she asked you that but as you feel her hands on you breasts and pinch your hard nipples you yelp in surprise "Nnhhhhhh ddddnnnnnnn!". A shock of pleasure goes through you as you try to unsuccessfully get away from her hands. There is nothing you can do as she continues to pinch them.
"See how they are pointing. And you are shivering. Are you sure your not cold?" Unable to move away there is nothing you can do as she plays with your nipples. Making you moan and shiver with arousal as your pussy starts to get wet. You nod your head unsure yourself are you answering her question or approving her actions. Just as suddenly as it started the feeling stops making you moan as your nipples miss the attention.

"If you're sure sis. Wouldn't want you to catch a cold. He he he he" Embarrassed with your bodies reaction you drop your head in shame thankful that most of your face is covered. Right now you would probably be to ashamed to even look at her in the eyes.
"Lets finish wrapping you up so you can escape Karen."
As you calm down from your experience and your breath returns to normal you feel her reach around your waist wrapping another piece of rope around it. You feel it tighten making a rope belt below your belly button. Thinking she is going to pin your wrists to your torso, your surprised as you feel rope go underneath you, between your legs. She passes it through your wrist ties and pulls it back underneath you to your front. And then she pulls on it tight pinning your arms above your butt and making the rope press on your pussy lips and clit. As it presses into you it sends shocks of pleasure making you arch your back and throw your head back. Before you even react she ties it of at the starting point below your belly button.
"Nnnhhhh! Ddddddnnnnnnnnnt!" Your hands instinctively try to reach for your front to where its tied, fingers frantically trying to find something they can loosen but you only manage to make the rope dig deeper into you. Realizing to late that this was not the correct course of action you calm down trying to ignore the effect it has, you try to plead to her to untie that rope.
"Nnnnnnnt, tttttt ttt. Pppplllls mmmmmyyyy tttt tt ttthhhtttt!"
"Whats that? You think I'm clever? Hehehehe. Why thank you. I thought so too." Her small hands start to explore your bonds making sure there is no slack in them. Pulling on every rope and tightening every knot.
"See, now your arms stuck there and you can't reach any of the knots. Until you untie your hands that is."
"Mmmmmmyyyyyy ppppplllllls" Leaving you with **** you start to wonder how to get loose from this. But every move you makes the rope between your legs dig deeper and send waves of pleasure. How the hell are you supposed to escape if you can't move. You could try, but now you risk of exploding in orgasmic ecstasy in front of your little sister. And you definitely don't want that to happen.