Hello Helen,
Most of the issues need to be dealt with on different levels of reality. In this case, you are not wrong in wanting to have nothing to do with your mum's brother. I think that your mum should respect that and perhaps should re-acknowledge the wrong that was done, and take firm action to not bring that person back in your life.
On another level, you need to work on the issue too, as it certainly has created a cellular memory / energy block, which may lie dormant but is still extremely powerful to cause not just mental anguish but can also lead to undesired physical menifestation as well as other behavioral issues. (feeling of betrayal, low self-esteem etc.)
Although there are a number of ways which may be useful for dealing with the emotional self, I find that the quickest, in my experience, has been EFT for this kind of issue. You will probably need to work on a number of related internal issues before a closure can come.
So, here is what I would suggest -
Use this opportunity to mend the inner wound, and perhaps clear up a few more inner blocks by using EFT to begin with, and other techniques, if you know them or feel comfortable with them.
Have a chat with your mum and explain that no matter how painful, a wrong has to be acknowledged and action needs to be taken. Not bringing her brother in your life again, is the least of the things that need to be done. The other end of this option can be the legal system etc.
You will certainly be able to decide what you think is the best course of action, but I do suggest that use this negative trigger to clear up the hidden energy blocks.
Universe sometimes re-triggers the painful memories as a reminder to work on the inner self and to grow 'free'.
I hope that you do realize that none of this was your fault, and that there is no need to punish yourself.
with love and peace,
Harsh
