AITA for not wanting my girlfriend to be topless in front of her friends?
So long story short my girlfriend was tanning out by the pool at her house with some of her friends whom both of which are straight girls her age. (We don't live together) She sent me a Snapchat of her from the shoulders up where it was apparent that she was not wearing a bathing suit. I asked her if she was wearing one and she said "no" but only jokingly. (I didn't find it as a joke at first). After a bit of back and forth of asking she finally said she was (which I knew was true all along). Finally she had said that she asked why I was making it a big deal. I said that I'm not comfortable with that whole situation if she's topless in front of her friends. She then says how she doesn't understand and that "they're all girls and nothing is sexual". I say that that doesn't matter and you can call me insecure and controlling but I'm just not comfortable with the idea of her being topless in front of her friends. Then she says "it is a little controlling".
AITA for saying what makes me uncomfortable?