Yes, that's what I meant. I guess I should have taken it a bit further. And I should have emphasized the word "if". Do I actually think BR told PR what he had done? No.
I agree with your theory - I think PR discovered JB after BR had already strangled her, that neither PR nor JR did that, and if one of them had found her before she was strangled they would have called 911.
Sure, parents kill. But they kill outright. They don't kill just to cover up what would otherwise appear to be an accident or a sudden illness. So, unless you think PDI all (and I don't), it doesn't make sense for her to strangle JB, imo.
I still think its likely he fessed up to them about it. Who would find their child dead and not get down to the bottom of it?