Becoming my sisters experiment

You really can't help yourself, part of the reason why Alice has always been able to sponge off of you is mostly because you always felt guilty about your collection of **** porn. Now your sister is a stunning scarlet haired seductress who is clearly just as interested in copulating as you are.

"Well then Big Brother, are you going to help me with my experiment?" Asks Alice wrapping her arms around your neck and kissing you hungrily.

You answer her without any hesitation placing your hands on her rear feeling those their cheeks under your hands revelling in the soft skinned and enjoying the sensation of her tongue in your mouth.

You hungrily make out with her grinding against her body you don't know why but somehow you're already losing control.

You can feel the heat as you pull back a line of drool passing between your mouths. Alice has a great villain laugh and she is laughing like a mad woman as you separate.

"Well it looks like my pheromone perfume is working, you didn't even try to resist me," she purrs lustfully "and here I was scared the experiment would fail, and if you're so keen to kiss me I can't wait to see how you react to the other tests I want to try. Are you ready to be my guinea pig Big Brother? I promise that if our experiment a success you will be paid back a hundredfold for your investments in me."

You groan, feeling the heat of your own breath as your brain starts to click, Alice really is a mad scientist, and since you had **** on the brain when you flashed her you have now created someone with all the powers of mad science and desire to explore her own warped experiments.

The only question is what kind of an experiment are you going to become the guinea pig for?