Where do we go from here, now that mom died?

Where do we go from here, now that mom died?
My sis-in-law lived with her mom for all her life and never married. Now that mom died and all property reverted to the daughter, what would happen to the property if the daughter should die? She has no WILL at this time but has a durable power of attorney. There are three other sisters in the family still living.

ca laws on trusts My brother is the executor, changed trust to his benefit and…

ca laws on trusts
My brother is the executor, changed trust to his benefit and tolk over the family home while mom was still alive. His paralegal forged my fathers signatutre to a durable power of attorney while he was incapacitated.Stating that he had gotten pretty good at it! Now my folks are gone and he is taking his time with the estate–how long does he have—I feel he is doing all kinds of wrong here. what can I do??