I'm just arriving at my apartment. My Grandma, who lives next door has locked herself out of her apartment. She want me to open my apartment back door to the common porch so she can get in her place [confusing that opening my back door lets her in her apartment, parallel universe, but then this is a dream]. I unbolt the lock to the door to the common area. We go out on the porch. Her fruends are there and we sit and visit. She can now get in her apartment next door through her back door.