If this is a sudden worsening, you may want to have your mother checked for a urinary tract infection. It's one of the most common causes of delusions in people with dementia, and once the infection is cleared up they go back to baseline.

If not.....I really think it's time to consider a memory care facility or a nursing home. Once they start to wander, they are a danger to themselves and need 24/7 supervision, hopefully in a nice, safe, pleasant facility with staff who are specially trained in dementia care. These homes often provide secured outdoor walkways and gardens where the residents can wander safely, activities that suit their limited attention spans, and whatever physical assistance they need, e.g. incontinence care.

I echo the other members who said it's important to avoid reality orientation, because it almost always agitates people with dementia. If they think it's 1964 and they're waiting for their kids to get off the school bus, who's to say that it's wrong? It was probably a much happier time in their life---their husband was alive, their own parents were probably still around, and they were enjoying their children's growing-up years. Who'd want to be reminded that their spouse is dead and they are losing their mind?

Wishing you the best with your mother's care. It's a tough, tough job and you MUST take care of yourself in order to deal with the issues that are going to arise as her dementia progresses. So sorry you have to go through this.