I am from a rural area. My parents died when I was young. Last year, when my grandfather was about to die, I found a Feng Shui master. After my grandfather died, the Feng Shui master made my grandma and grandpa sleep together.

Can sunlight get in through that window? Where will the bed be exposed to sunlight? If you can get more sunshine, it is still a good choice.

Your grandma and your grandpa have a better relationship, right? Did they always have something to talk about when they were together? Do you know what your grandma is doing when she goes out? Looking for someone to chat with or sitting or walking alone?

Take more time to chat with your grandma, at least for an hour every day, even if the content is about whether the weather is hot or cold, you see ants crawling when you walk, what the clouds look like when they are blown by the wind, etc. Chat, no matter what the content is, let her know that you care about her and you care about her. Even if there is no topic between you, doing your own thing in front of her and letting her look at you will make her feel at ease.

If after a month or two of doing this, your grandma still has to go out at night, she may miss your grandpa very much and want to talk to your grandpa in a deserted place (this is My guess, it may not be true). If possible, ask her what she was doing when she went out, and then you can find a targeted solution.

When encountering a problem, try to look at the problem and solve it from a "scientific" perspective first. If you really can't find the reason, then consider using "divine things" to deal with it.

Most elderly people feel very lonely and need more company and conversation with their relatives. What they need is family affection and a sense of security.