My mother-in-law, who is in her 80s, has lived in an apartment in our house for many years. Now that our children are grown up, my wife and I would like to move to a smaller house, but what about her mother?—Son-in-law
So, while your children were growing up it was great to have Grandma right there – to help out with baby-sitting? But now that you and the children do not need her anymore she is just extra baggage?
At her age, it probably will be difficult for your mother-in-law to adjust to new living arrangements. And bear in mind that when you get older your children may treat you the way they have seen you treat their grandmother.
Perhaps it would be best for you to wait a while longer before you make any changes to your living situation.