have you been accused of something you did not do?

Yes and it hurts. This happened last all saints day. In the morning my husband & I went ahead to visit our departed love ones. In the afternoon it is my mother in-law and sister in-law's turn to go to the cemetery. When they've gone, i locked the front door and closed the kitchen door. I stayed at the laundry area which is adjacent to the kitchen and I could see who comes and pass the house. When they got back home, they ask me if somebody had entered the house and I answered back none and I myself had not entered because I'm washing our clothes. My mother in-law insists that somebody has entered the house because her jewelry case was missing on its place and she kept on murmuring. I called my husband to come inside and helped locate the missing box and he found it just infront of her at the cabinet where she last placed it. I got mad and hurt and I cried on that situation, blamed of a thing not done. Until now it still fresh on my mind. Before, I don't even go to their rooms much more now that I don't touch their belongings even if it is scattered. I'll let them collect and fix it.

You are right people are so imperfect, thats why your mom blame you without thinking that thief can be good at getting inside the house, they are just shocked and psychologically they want to ease it by blaming someone. Don't get mad at them its human mechanism. If you are sure that you really locked the door why don't you investigate the house of any possible netrance like upper windows or garage, or maybe forced entry at the door. In that way you can attain justice against accusation. Lots of people experienced to get blamed, not just you, its really hurt thats fact, just understand them, you can think of any bad things against your family, but never forget to forgive them. Even if its not your fault, just say sorry, it can calm their mind and heart.