I am the primary caregiver for both parents who both have different forms of dementia. Their behavior ranges from kind and thankful to rude and selfish. My children witness this so I try to correct it or just tell them I dont like their choice. I am met with more rudeness. For example, I often have to remind parents to wash their hands coming out of the bathroom, which evokes their anger since they are adults after all. Or, that it is important to be patient and wait when my parents are so demanding for their drink NOW or their TV remote NOW or assist me NOW. How do I teach proper skills to children when there is not consistency for everyone in the house?
And on the hand washing point, what I used to do was sweep my mother back into the bathroom, wash my own hands and do hers at the same time. No discussion so no humiliation. Or not that she complained of, anyway!
Even quite young children can adapt to inconsistencies, especially when they understand them. Children who spend time with each of their divorced parents quickly adjust to the different routines and rules at the two houses. Children can adapt to you treating your parents differently about the rules than you treat them. You can tell the children how happy you are that their brains work so well and they can learn polite behavior.
The opportunity you have for setting an example for your children is that we show compassion to people who are ill or have impairments. That we continue to be nice to them even if they can't always be nice to us.
The older child understands. She is 6 and gets it that grandma isn't normal. it used to jsut be that grandam would yell randomly at her for doing things but I have noticed now about a year later that the little girl just doesn't even blink an eye and doesn't respond to her. When questioned she seems to understand that grandam is a special case as she's confused all the time and we always listen to our parents and elders. (although she's rebelling she does understand that). It helps that I'm constantly helping her as though she's a child. I think Emmett sees her as a child but loves her just the same. He is always trying to help her eat, making sure she takes her pills and crawling up with her to sit with her while watching his TV or eating a snack.
I think it's all in the explanations and how it's handled. Anger is hard to understand in children but they are also forgiving. The two children I care for seem to be forgiving of grandma's angry state of mind and even going as far as to almost pity her (they might be learning from me on that one). They enjoy her when she's happy, avoid her when she's upset and ignore her when she's mad.
How old are your children? If they are old enough to understand about illness, tell them what is going on with their Grandparents. You'd be surprised how smart kids are even at a young age. If they understand, they might surprise you and help out with small things without you asking.
Please arm yourself with all the information you can about dementia. Scroll down to the bottom of this page to the blue section.... now click on ALZHEIMER'S CARE... now look at the articles regarding Alzheimer's [which is a form of dementia] to see what will be coming down the pike as this disease progresses.