Was I wrong?

A girl I have known since high school moved in a few doors down from me. Her car broke down yesterday, and she asked me if she could use my car today. When she brought it back, she said. "Just to let you know, it's almost empty, and it was almost Empty when you let me borrow it so I put $20 in it." Then she stood there staring at me. I asked her what's up and she said." I want my $20 back." I told her she was the one that drove it. She just looked at me and then called me a cheapscape and walked away.