Someone PLEASE HELP!

HELP ME...!!!! Please :(

Im stuck .. The part where Im in the burial mound, I am trying to open the sarcophagus ... I have poured the wine up top....I have aligned the bones...
Nothing happened??!
I have 3/4 white flowers and a tile piece in my inventory...
I read somewhere that the tile piece goes in the puzzle in the treehouse but I still have to get the crescent moon shaped key to unlock the padlock...
I have back tracked to all other areas of the island... The hint button keeps telling me to "try something in other areas"... And I am going crazy :(

Someone please help... I have been stuck for DAYS and feel dumb that I cannot figure this out.

That B¡tch about Shiver: Vanishing Hitchhiker (Full)