“I am sorry that my sister got delayed at the mall.  She should be back soon for your date.”

“Don’t worry, I am sure we can think of something to pass the time while we wait. Let’s get to know each other a little better. I have heard that you are something of a stud around school. You have a reputation for dating a lot of girls, then dumping them after you get laid. I am sure that you would never do anything like that to my sister, would you?” 

“Mmmmmm mmmm.”

“Oh right, sorry, you can’t really answer me with the duct tape on your mouth, can you? Don’t worry, once we have finished “getting to know each other”, we can remove the duct tape and discuss how you plan on treating my sister.”