This isn’t something I like to make public because it is still a very painful subject for me, but I will do this to help you with your girlfriend Biotech. My daughter was raped at the age of 13 also. While she was going through a very emotional recovery, she asked her boyfriend to kiss her as well. The reason why she did this is not because she was feeling any kind of affection for him. She wanted to be the one in control of what happened to her body. She felt like she had lost control when the slime she thought was a friend raped her.
So you need to know that your girlfriend will go through many changes during her period of recovery, and her choices may not be what is best for her. If you want to be a good boyfriend to her, you need to understand these things, and help her know that now is not the right time for phyical contact between the two of you. She needs the time to clear her head, and get some councelling so that her future relationships with boys/men will be healthy ones, and not based on her feelings about the loss of control she feels because of the rape.
Let her know you care about her, and you are there for her. Let her talk about things when she wants to, but don’t try to get her to talk about what may be too uncomfortable for her. It’s going to take a very long time for her to heal. This is not something she will get over in a week or two, even if it seems like it on the surface. Just be very patient. There is plenty of time for kissing later on. Much later one.