Having been in the situation at a wake of a pilot, of being told by a relative that they where having big problems with the undertaker not allowing an open coffin.
I suspect that someone hasn't sat them down and told them what actually occurs in a high energy crash (indicated by the wreck break up) into incompressible water.
And if a relative is reading this sit someone down and ask them directly. I am not saying this with any sort of glee. I just don't want you pushing and hoping for something which is going to cause even more hurt, than knowing the truth.