Tenant's Husband Left - Gambling

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My girlfriend's friend's husband has been gone for a couple of months due to his gambling addiction and has left her with the kids and the rent. She is in no way capable of sustaining the rent from here on out and has been late ever since he left - what should she tell the landlord in order to achieve the most advantageous situation for everyone?

What should she do next? I'm assuming get a cheaper place to live?