We moved into this apartment six and a half years ago. The neighbors upstairs are an elderly couple.…

We moved into this apartment six and a half years ago. The neighbors upstairs are an elderly couple. The neighbor is a feisty, loud, strong woman. And her husband is calm, quiet, and hardly ever left the house. A couple of years ago, doctors and ambulances started visiting them frequently… The husband got sick. He stopped leaving the house altogether, and they'd take him to the ER periodically. Basically, he stopped getting out of bed. His wife took care of him. About a year ago, on my way home from work, she called me from upstairs. Like, "Help me." Before that, she'd met me a couple of times. The first time, she was lucid, understanding who I was and where I lived. Then the second time, after her husband had gotten sick. And then she calls me, and it's like she doesn't know me. She says she lost her phone and asks for help finding it. "Do you remember your number?" I ask. "No," she says, "I'll look in my wallet, come in." I go into her entryway, and on the inside of the door, there's a printed reminder that says something like, "Don't forget to turn off the light, grab your keys and phone before leaving." That's when I thought her memory was really failing. She's searching for her wallet, lamenting, "Oh, my head just isn't working right…" She found her wallet, and I called her number; the phone was found. As winter approached, it got quiet at their place. We have excellent soundproofing, so we could hear their TV, and when they argued. She'd yell about him soiling himself, etc. And he'd shout that he was only alive thanks to her. I thought maybe their children had taken them in. Although I don't know if they have children. But I saw a photo of a boy on her phone's wallpaper once, and I thought it was her grandson. This spring, I saw her. She walks with a three-pronged cane, slowly, and it's clearly difficult for her. Later, my husband said he met her when he was walking home; she had come out of the building and asked him for directions to the dumpster. For the last couple of days, she's been crying in her apartment. She came home alone, by the way. Her husband most likely passed away. That's what I think. Today, I'm coming home from work, and she's standing at her door again, calling for help. I went up. "Help me," she says, "lock the door from the inside. What do I need to do, how do I lock up so I can go to sleep?" I spent about 15 minutes teaching her how to lock the door. I wrote on a piece of paper that's hanging on the door, showing which way to turn the key to lock and unlock. I drew arrows because she was confusing left and right. She locked herself in, and I told her through the closed door not to open it anymore and to go to sleep. After I got home, my husband went to the store. He says she opened the door again and called for help. He helped her lock it and came home. Then she opened the door again, and a neighbor's boy helped her. Then his mom came out. It seems quiet now. My husband asked if she had any relatives, and she replied only a niece. Although, I don't know if I should believe her anymore. What do you do in situations like this? Next time, I'll definitely try to get a phone number for one of her relatives. But what if I can't? It's dangerous for her to be alone. My husband says he often sees her with different women. She goes to the store but can't find her way back on her own.