Can you imagine being so seemingly desperate for your daughter to 'marry well' that you didn't want to explore it, at least? Or thinking: we've not educated her, she's working in a pre school, she's hit the jackpot, it's the best she can do, best not get in the way.
I am not trying to excuse the RF. But I am puzzled her family's role in all this has never been explored either.
I was not born British and didn't live here at the time and it could be that poster who were have another perspective.