The stronger the mutual trust between the two, the easier it is to hypnotize them. So what if the siblings get along well? My sister always walks around the house in a defenseless outfit. I really want to have sex with her, so I try out the hypnotism I just learned. It's crazy! The hypnotism is crazy! The hypnotism is too effective, and my sister goes out of control and sucks on my dick with her instincts exposed! Now my sister is mine and mine alone.