Put the gag in. She needs to shut up.

You don't talk, just put the ball gag into the mouth of your tormenting big sister. She scowled, being gagged was something she hated. You needed that after her torrent of taunts.

She still tried to taunt you, but it gave you more confidence, hearing that mouth of her only make sounds that were far from what she was trying to say. You bent down and grabbed the blindfold. She tried her best to keep you from covering her eyes, but she ultimately failed and now, you just had her cuffed, gagged, and blindfolded. You loved her like this.

"You'll stay like this until I feel like letting you free." you said, proud that you have your tormentor, your own sister, is now unable to do anything. You never thought beyond this moment, but it reminds you of the videos you watched, ones where a girl had another restrained like this, and used the helpless girl sexually. You lifted Elena's shirt up and revealed her large tits. They were a size bigger than yours, and she never wore a bra, besides sports bras. You massaged them.

You felt yourself getting horny, as you toyed and clawed at them, feeling you anger turn into something different. It felt just like anger, but instead of ****, you wanted to sexually **** her body, like you seen in the videos and read in books. You tasted one of her tits, and it was delicious. As much as her moans that she couldn't help, something she probably wanted to keep from happening.

You sucked on one tit, then alternated between sucking her left and her right, massaging and clawing the one your mouth isn't on.