During our secret affair, my sister can only say "Big Brother". What's strange is that just by saying "Big Brother", I can not only convey her emotions, but also her thoughts. She gives me a blowjob with her cute mouth and makes me cum... She seduces me by changing into my favorite school swimsuit... She washes my dick in the bath... Although my sister only says "Big Brother", she is shy but also clingy, and always accepts all of me into her body. And our secret affair continues all night long, culminating in an orgasm... My sister, who surrenders to pleasure and listens to what I say, is the best girl.