What about at the wake? I am sure their paths would have crossed several times before she went to the police. You just make stuff up. You have no evidence or qualifications to mind read all the actors in this drama. Many of your posts involve you psychoanalysing peoples thoughts and motives. That is ok when related to a piece of evidence but most is your psychobabble.
From what you say, you seem to think we're all puppets. That we have no emotions. You are correct in that they would have met at the funeral and the wake, although they probably weren't alone together in either of those places for long. It follows that, at a wake, even a tiny one held in JB's tiny cottage, people will have shared their thoughts and feelings. As they were mourning an entire family, which included two small boys, it's unlikely to have been a knees-up, don't you think? There will have been thoughts appropriate to the solemn occasion. Better to be qualified to understand what how people are most likely to act under given circumstances, than spout moronic facts which have been bent to how you'd have them be, eh?