That's what I thought too Allthewaves, it's the fact that this man is evil and knows it and doesn't WANT to not hurt children. The lack of remorse, no prospects of ever rehabilitating this man will be a hard concept for most to get their heads around.
Tothemoonandback You are absolutely entitled to be spooked by him. A therapist on the outside will gel with some clients and not with others, the fact that you have not gelled at all with this client isn't that hard a concept to get.
You are correct in not wanting to share details about your personal life, and actually, if this is a general boundary that you have, good for you! It's not 'rude' to say that you don't want to share aspects of your private life in your professional life.
I'd also wonder if this manager of yours is subscribing to a sexist belief that a woman can't say no without appearing rude and that she must provide all info if requested to by a man.
I would absolutely repeat and repeat that my personal details, family, or any kind of details about your life outside the facility are off limits and irrelevant to him especially as he will never see the light of day again
Your manager should be supporting you as a professional, in saying that your private life is of no relevance to this man, and you are within your rights to decide to share or not.
It could be that you could learn from this experience, but one would have to say that while he may deserve this service, due to your lack of connection with him, it's less likely to be effective than if the relationship were on better terms.