Is it wrong to watch a movie with my teacher in theater?

So basically we have no school due to winter breaks. 2 days ago me ad all of my family members decided to go to the theater and watch a movie. As soon as we arrived there, me and my mom were waiting there for my dad and my sister to get popcorns and coke. As we were waiting, I saw my teacher there and we found out that we are watching a same movie. Before you guys get anything wrong this teacher is like a brother figure to me. He's 25 and my science teacher. Then, he offered me to watch a movie with him. I said "I have to wait till my dad comes because I have to take his permission". My dad already met him on parent teacher interview and my dad thinks that he is a really good and a nice teacher. My dad allowed me and him to watch that movie together. I mean we were all in the same theater but we were just siting together. Thankfully, there were no bad sceans! After we finished watching the movie we just waited for my sister because she was in the washroom and we just talked about school that's it! Then we just said Good bye to eachother and I came home with

My family. I am 15, in grade 10 and in high school.

Is there anything wrong with this.

Once again I am saying, he's like a brother figure to me! And I take him as my older brother!