She dominates me

Her grin becomes diabolic and I slide to the side of my bed a little anxiously.

What is she doing? How long has my sister been this way?

"I'm gonna make you purr, kitty," she says, grinning, opening my closet. Does she know about my toys? "That's exactly what I've been looking for," she says joyfully, grabbing the strap for my strap-on. Slowly she straps the bands around her hips and her buttocks. She moves to the bed and grabs the dildo. Quickly she attaches it to the holder and grins. She rubs her fingers together. "Come here ... kitty kitty kitty ... come here... get the treat" she pretends to talk to a real cat and continues with her lure.

Completely shocked by the whole scenery I stay on the other side of the bed. I don't know how to react. Susi kneels down on the bed and rubs the rdildo covered in my juices. "Come on ... be a good girl, that's all for you. Veeeeeeeeeery delicious," she whispers.

I try to resist her, but everything about me wants to feel it in me again and I know that it is only when I obey her. Still somewhat reluctantly, I get carefully on all fours and crawl towards her. "Fine kitten ... That's good," she whisperes, grinning and holding the rubber cock. Slightly frightened, I slowly put my tongue out and let it streak across the artificial glans. Her hand reaches behind my ear and begins to crawl. "It's a good thing, I won't do anything to you, kitty, nothing you don't want to at least". I am somewhat bolder, accelerated by my increasing arousal.

I spread my lips and glide slowly around the rubber cock. I look at my sister's face and start slowly wiggling my butt, as if I were a real cat, that joyfully whips its tail.

She grabs my face and pulls me completely on the imitation of the penis of my boyfriend. With one hand, she grabs my hair and makes sure that he is completely burried in my mouth and throat. With the other hand she reaches over my back between my legs. "You see kitten, it's easy when you obey your mistress."

I let my belly and my vocal chords vibrate to imitate the purring of a cat.

What'S wrong with me? This can't be? I am not a cat and certainly not a pervert, which is turned on by their own sister turning her into a nymphomaniac pet. On my birthday, that is. So why the hell am I so aroused and obedient?