My question involves landlord-tenant law in the State of: California

I am a Subtenant in a single family home in San Francisco. I do not have a lease with the master tenant and I do not believe her lease allows subleasing. I have never seen a copy of the lease. My husband and I have lived there for 2 years and 5 months. She notified me today, 6/2, that she is moving out at the end of the month and we need to be out. She also said that she needs to take all of her furniture and personal belongings out of our space (we live downstairs and she lives upstairs), some of which we use, in the next couple of weeks. I have asked for the contact information for her landlord so I may see about signing our own lease, but she will not give it to me. Do we have any rights in terms of occupancy or taking over the lease after she leaves since we have been tenants for so long?