Yea she was going to rob you. She was trying to get you back to her place where her friends were probably waiting for you.
There was a reason her car stood there for so long. She was debating whether or not to go after you.
As with all things in life, if it sounds too good to be true, its probably a scam.
The trick would have been to say, "how about we go to my place instead" and if she hesitated and/or said no, then you know to GTFO.