I'm not looking at a particular person and I wouldn't be pointing if I were. The relationship between the two families was, we are told, distant and hostile. That is what the people in the families say, and if there had been a conspiracy it might suit them to give that impression. Secondly the hostility we observe there ourselves is after William's disappearance. If there was once sympathy and co-operation between some elements of the two families, it would have been affected by what happened, where according to my scenario they blame each other (nobody understands, or not all of them understand, how things went awry that day; if there is a 'middle man', what ultimately was William's fate.)