"I have had to consider the question of dangerousness and for the reasons that I have already set out, I conclude that you are dangerous within the meaning of the Act: that is there is a significant risk of you committing further specified offences, and you present that risk, I am satisfied, because of all the information I have, in particular the fact that you have offended against three family members over an extended period of years with a gap in between. It seems that you take the opportunity to offend when the opportunity is there."