The Lady Who Honked

Today I left work and got in my car. I took my time cleaning up my accumulated trash and getting situated. I had not cranked my car. My brake lights were not on. Neither were my reverse lights. Then I heard a honk. I looked behind and there was a woman with her blinker on waiting for my parking spot. I put my hand out the window and waved her on. She did not. I debated whether to intentionally wait it out and see how long she would sit there. But, I was pretty much ready to go. I took my time finding my keys and cranking my car. I eased out of my spot. She pulled in. There were more than a few cars behind her. Was I wrong to find her rude?