I really think that this movie sends out the wrong message.Lily was mentally ill and she needed proper medical care.Why wasn't the subject of her following a proper treatment never brought up in the film?Also,the solution, when an immediate family member suffers from (possible) schizophrenia, is not to join their frame of mind and put everyone's safety in danger.
I have to agree, she clearly needed professional help.When there's no more room in hell, The dead will walk the earth...
Lily's character was not interesting at all.
It wasn't her liberate Clara from unchanging life,
Lily ruined her sister's marriage and misled Clara to an unstable future.
Pierre has done nothing wrong to lose his wife.
And sometimes got laid with a bunch of homeless guys,
what kind of life style it will be?
definitely not for Clara, she should be a decent lady.