I actually thought Tammy was mentally disabled
The way it was acted and presented at the start I actually thought Tammy was meant to be mentally disabled and that her 'husband' was actually her brother or something and she was just crashing at his and his actual wife's house.
I kept waiting for the reveal that her family were all humouring her and she was actually having real mental issues. I was expecting the film to turn out to be one of those comedy that is actually about real dramatic issues deals – but, no. We were actually meant to empathise with her as the 'hero' of the piece.
Car crash of a movie, so, so bad on many levels.