I think it is very difficult to say categorically in a given situation as to what you would do . It will of course depend on all the facts and circumstances at the time .
I am really sorry to read of those parents who have been put in that really difficult position of going no / low contact . I am sure it wasn’t an easy decision and one that was taken to protect themselves physically / mentally and also to protect others .We each have our own breaking points when we reach a point that we may have to make a decision that others would say they would never reach .
The point is that we don’t know what we would do definitively and some people may cope with more than others . There may be circumstances when I think I would stop contact .
There will also be parents who will be willing to excuse anything their child has done even if that is sexual abuse of another family member . The awful anonymised example given earlier in the thread of the mother who wanted to brush everything under the carpet when her daughter was sexually abused . If you read any accounts of the victim in that situation they detail that the ( unsupportive ) reaction of eg a parent when they are told / find out can sometimes be as bad as , if not worse than the abuse itself .
Yes a crime may be so abhorrent that you would think in those circumstances you would cut them off . I don’t know , I think it is more likely you would cut them off .
I think you may feel some guilt that it was you that brought that child into the world and may try and reach out to the small chink of humanity that may be left in them .
You may be left wanting to know why , there may be benefits to continuing to see them eg in prison . The only one I can think of off hand , is those cases where someone has been convicted of murder and refuses to reveal where the body of the victim is .
it is really difficult to know . I think some of the parents who maintain contact with their child , may also be able to compartmentalise ie see their child as separate to the crime , may even believe they are innocent .They aren’t necessarily condoning the crime .
Who knows , we don’t know .
I would also say as someone who has experienced a messy relationship break up that you also don’t always react as you may have thought you would .