Chemical Compound Experiment Turns Stepsister Into Mindless Sex Slave

You have been secretly creating a chemical compound that you believe to be the strongest yet. You have been using this on your stepsister, Valyrie Lutka, without her knowledge for months. You have been slowly transforming her into your personal fuckdoll, manipulating her mind to obey your every command. She now mindlessly does whatever you command without any memory of the devious things you have done to her body. Your ultimate goal is to continue experimenting on her without her awareness until she is your complete mindless sexual slave.