I broke my neighbors drivers side window out with a pebble from my weed whacker ... now how do I pay her back?

I was weed eating my yard. A small pebble hit her car window and broke it. She had the window replaced for 200. I paid her. Then she came back the next day and said the window wont roll up or down because gl got in the motor from the window breaking. She wants an extra 180. I gave her 180 tonight. I fear she is going to come back and want more money. How do I handle this?