Yes they did show her body... first instance he sees the arm... then as he walks in he sees the dead body of his sister... followed by the dead body of the mother.. followed by the dad... a few seconds later they show the close up the severed arm... but he did see the body... and so did we..

go to time 2:49 and you'll see the body...



So i'll give you the same advice you gave me... please go and recheck the details before arguing them