Firstly she won't hate you afterwards. If she is the one saying she wants to do it then she's already made the decision that you're worth it and doesn't associate you with the jerk she was with before. Not only that but it's something you want. If you deny that you aren't being honest with yourself and therefore not being entirely honest in the relationship. Just let things happen how you both want. You aren't begging or even asking her to do it, so if she wants to let it fly and enjoy it.

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Heit ist mein taug.