Highway Speeder

It was the last 10 minutes of his shift on the highway, and this cop had yet to catch a real speeder and score a huge ticket. Just as he was about to give up and drive away, a car appeared on the horizon, moving extremely fast.
The cop pulled up his radar and, score, the driver was going 20 miles per hour over the speed limit. He jumped in his car and turned his siren on, motioning the driver to pull over.  However, the driver just sped up and kept going for a few more miles before finally pulling over.
The cop got out of his car and the driver rolled down his window.
“Oh, I’ve been waiting for you all day”, the cop said with a wide smile to the driver who happened to be a young girl.
The girl replied with a wink, “Yeah, well I got here as fast as I could.”
The cop laughed and said, “Oh yeah? So why didn’t you pull over right away?” 
“Well, daddy told me to always play hard to get.”
When he stopped laughing, the cop let her go with a warning.