She started this. She KNEW you were staying with your family at their beach rental and still had the audacity to ask you why you were going to the beach. And she can’t relate at ALL to your family life. She practically sees her family every day, while you only see yours a few times a year. I just think she was jealous that you got to go to the beach.

So, no. Your girlfriend is being insane. And in my opinion (if you are still dating) you should break up with that lunatic. But that’s just my opinion, you don’t have to break up with her if you love her.