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Thanks again. Yes, it is serious, however, it is my son who has to decide the next course of action not me, once he has all the available options. He will be the one who then has a sense of control rather than the other person. Incidentally he is 21 now so, sorry for not making this clear. The abuse happened when he was a young child.
She is my ex-bf for a number of reasons but mainly because of her over-bearing personality and her life style choices. The thought of even seeing her again just fills me with anger, so I'm not going there, well not at the moment!