<human>: So my 9 year old is very opinionated. She constantly argues with her mother and I about everything, and throws tantrums that rival her younger brother when we argue with her. 

We were running late for her camp today (indoor camp, but they spend a few hours outside), so I did not have time to put sunblock on her. Once I signed her in I went to reach for the sunblock in my bag, and she completely freaked out. She could hear the music starting for camp and didn't want to be late (all in the car she argued with me that we weren't going to be late, which is another story for another time). She kept trying to tell me that she didn't need sunblock because it was cloudy outside, to which I replied "I don't have the time to explain how the sun works today, so you can either put this on or get sunburned." To which she replied, "I'm not wearing it and I'm not getting sunburned." So I let her go. Reddit parents, am I horrible for doing this?

Can you condense the text into three sentences or less?
<bot>: My daughter was acting like a little know-it-all, so I let her go to camp today without sunblock. Am I wrong for doing so?