One of two tenants vacates....lease dead?

[Andres Piedra]

I know this is probably state specific, but, perhaps many states have the same laws. An unmarried couple rented a property from me. They ended up as a terrible couple. She moved out, then convinced him to move out so that she can move back in. It almost sounded like a "who gets the house in the divorce?" scenario, however, the house is not either of theirs....it's mine. Anyway, this lady likely does not qualify on her own. I'm due to have a conversation with her about this today. My advice to her is to to give me the keys and walk away. However, her ex tells me she's acting irrational as if she owns the house.

Is this lease void the moment they vacate?  I've already started the process w/ my 5-day notice letter and on Tuesday I will file for eviction, just as my process dictates. But, I do wonder if this thing is dead the moment they vacated.