Parmida Aghdasi

(may have spoilers) I am not someone who knows much about films and the techniques used to make the film. First, let me state that the acting was very good. I'll give them that. But WHAT THE HELL WAS THAT ENDING?!? WHY didn't gran gran attack her family when she was in her "Full form" but attacked them when she was "transforming"?. What was that creature anyways (in the end)? who did this to poor gran gran? Why was the door infected? will the door also transform like gran gran? is gran gran even alive anymore? how did it infect the mum? is it like corona and whoever touches it will get infected? does that mean that the daughter is also infected? Does this all have anything to do with the dead grandad? AHHHHH I have many unanswered questions. (I'm sorry if they are stupid questions). But then again, good acting.