OH MY GOD. That would have scared the daylights out of me. Thank god for mother's intuition that woke you up that something wasnt' right. We have tons of those anti-turn childproof plastic doorknobs for our house that doesn't allow Joe to go outside or open the basement door..and of course..locks locks locks hee hee.
Off topic-I work in the life insurance field and if you haven't already gotton a Power of Attorney for your Nana, I would suggest you do so now. If you are her primary caretaker and not just for medical but get a Durable Power of Attorney to authorize you to handle her financial affairs if she becomes totally incompetent. When she becomes engulfed in full blown dementia, she will not be able to handle her affairs and if you have a Power of Attorney for her now, you can sign on her behalf to handle her accounts in the future when that happens. Otherwise, everything can get all locked up and you'll have go to court if she's not competent and hire expensive lawyers, that can be even more costly. I would hate for you to be caught up in that battle. I hope if you haven't already thought of this, you should look into it.
My Nana just turned 90 and is amazingly in good health, which we are ever thankful for....a little osteoporosis...but other than that she is sound as they come both mentally and physically and my parents have POA for her "just in case"...she's the only one left out of both of our families..we call her "super nana" hee hee
I think everyone should have a POA, you never know when something could come right out and change your life forever like a car accident or a stroke...
The only thing we have to fear, is fear itself. All the rest is a piece of cake ; )