The SD story isn’t adding up.
BK flies back to surprise his wife (he does back to back reverse flights, which is rough on anyone).
He just happens to be there when she has a massive heart attack and drowns in the tub.
Usually when people have a heart attack, they shout, exclaim or make some juddering noise..
How & why would someone as fit & slim as SD have such a major heart attack at the age of 55?
I incidentally went to a memorial service of a similar aged lady on the same day the news broke out. It was a heart attack but there were signs of ill health a year running up to that..