Maybe William isn’t trying to “silence” his mum so much as let her rest in peace? She’s been gone for a long time and what’s in the past is in the past. Maybe it hurts him to have it all dragged up all the time. My mum died 5 years ago and while I want to remember her and talk about her with my kids and share what she was like, as I’m sure William does with Kate and the children who never knew her, I wouldn’t want to see her all over the media for things that happened 40 years ago.