In California "Bob" was living rent free for years in exchange for caretaking and minor repairs, no written contract. Six weeks ago Bob's sister "Sue" began to spend substantial time the residence during Bob's terminal illness. Now Bob has died, what statute or cases support Sue's claim to have rights as a tenant or squatter? What if Sue is the heir, does Bob's tenant right pass with the estate possibly?

In California, "Bob" was living rent-free for years in exchange for caretaking and minor repairs. There wasn't any written contract. 

Six weeks ago, Bob's sister "Sue" began to spend substantial time at the residence during Bob's terminal illness. Now Bob has died, what statute or cases support Sue's claim to have rights as a tenant or squatter? What if Sue is the heir? Does Bob's tenant right pass with the estate possibly?