Diary of a Mad Black Woman (2005)

Visible crew/equipment: In the scene where the piano collapses, after Madea's chainsaw rampage, you can see the wire that pulls the piano apart.

Joe: Who dat is at the door?
Madea: Shutup Joe I got this.
Joe: I'm gettin' tired of all these people comin' ova here late at night, I'ma hafta put my foot down.
Madea: Kunta Kinte put his foot down and it got chopped off. Now shut the hell up and go back to sleep.

Question: If Helen is related to Madea on her dead husband's side, how is her grandmother, and what what relation is Helen's mother Myrtle to Madea?