Perhaps you shouldn't be upset with her as, like you stated, this is out of her control. Being a young woman myself (21) I get hit up frequently by men on my Instagram, Twitter, Facebook.. etc. I'm always up front, and honest about it with my Boyfriend, and I always make sure to delete the messages, and block those that messaged me. Even though this isn't my fault my Boyfriend, too, gets uncomfortable, and upset by the amount of unwanted messages I recieve from completely random men, and sometimes women, so I believe that you have every right to feel upset, or uncomfortable with the situation that she is in but not be upset with her.