AITAH for ignoring a child at the movies?

Today, I (16 F) was at the movies with my friends. There was a little kid right next to me. Close to the end of the movie, the child apparently kept asking me what time it is. I am hard of hearing. At the end, I went to the bathroom and that is where that child’s mom cornered me and started yelling to me About how I ignored her kid. I told her that I am HOH and she laughed and told me to stop lying because I “don’t look disabled.” Remember, I genuinely did not her the kid. So, AITAH?