Well I have missed my sis, but I have been thinking about her....
I want to take you on a little trip. It is been a long time since we have been to a movie together and I think we should go again. I tell you I loved your last outfit - the one with plunging neckline and no bra or panties. You tell me you have a similar one and I tell you to wear it and be ready to go soon.
You hang up and get dressed. In about 20 minutes my horn honks and you run out to greet me. When you get in, you give me a kiss and hug, and squeeze my crotch. I make sure you are bare, and find you are already wet.
Like a typical little sis - even at 19 years old - you ask over and over where we are going and what we're seeing, even though I tell you that you'll find out when we get there. Finally I lose my temper and give your thigh an open hand smack so loud a car next to us hears. I then pull over, take off one of my socks, and put it across your eyes - forming a blindfold. I then lower you down so you are belted in, but below eye level reminding you I don't like being questioned.
After a little while, I stop the car and tell you I'll be right back. When I get back, I take off your seatbelt, and help you up and out. Like a good girl, your blindfold hasn't moved, and neither has your gag. I lead you into a place with cold AC, and you feel the darkness. I lead you into the theater and sit you down on a leather couch. You hear the sounds of people having sex, and then I remove your blindfold.