Crabby Lady!

So it was 2 dollar Tuesdays at the Dinosaur museum and I decided to take my kids. It was great not paying very much, but man it was crowded. We were at the water table and Justin and I were playing with a dinosaur having fun. This kid who is about 6 comes up to Justin and yells at him saying he took his dinosaur and he goes to tell his mother. His mom walks towards me and she tells me that my son needs to give it back because he was playing with it first. I told her WE have been here the whole time and her son was not playing with it. I also said there are so many dinosaurs your son can play with you just need to find them. She tells her son, "Looks like this mom won't give it back to you because she is a bad mother." I replied by saying, "excuse me that was very inappropriate to call me a bad mother." She walked away and I went and found her son some dinosaurs to play with. I told him to go tell his mother that I helped you find them. She told her son to be quiet and she would not even look at me. Did I do something wrong???? I fell that there are two types of mothers in this world. Those that feel their children are perfect and can't do anything wrong and those that correct principles when their child does something wrong. I definitely would have given the dinosaur back to her child if Justin did take it away. Because he didn't, I felt that her child did not deserve the dinosaur for lying. FUN DAY!