About a week ago, while my gf was with her friends one of them, who is known to have recurrent cold sores, took a bite off her fork. I don't know why but my gf continued to use the same fork, even if at that time, she saw that her friend had something near her lip that looked like an outbreak. The problem is that the same week, I kissed her and she gave me oral sex. My question is would she be infectious if she didn't had her primary infection yet?