Just for context, Yes i still live under my parents roof..technically. We live in the same country but they both live in a other province. I live alone in this house with my boyfriend. We both work during the day, keep this in mind. We rent this house from my grandparents they helped us when we moved to the same town as them so our rent is very cheap. Our doorway in the living room has shocked us a few times and my grandfather has to fix it or hire someone to fix it as he owns the house, this is also a important point to keep in mind. Anyway on with the story. Today i went shopping with my grandmother and on our way back she asked me if i want to go home or stay for coffee. I told her no i would want to go home as i have some cleaning to do. Then she said "Yes your room is probably a mess right?" And i didn't think much of it until she said "Yes it is your grandfather told me so". So obviously i ask her how does he know? Did i he go into my room? And if he did why? She then told me that he did go into the house to investigate why the doorframe is shocking us and if it can be faulty wiring with the new lights he put in a year or so ago. This wouldn't be a problem if he had just gone into the living room and through the house. But he went into my bedroom to "check the lights"... the lights that are creating this problem are in the living room on the opposite side of the house. I know it is those lights because since the doorframe has been shocking us if we touch the exposed iron 2 of the bulbs have gone out. And why would lights that have been in this house for the 11years of being here now suddenly cause problems? Anyway after finding out about all of this i felt as if my privacy has been invaded. I feel like he had no justified reason to go into my room other than to snoop? Idk tell me if i am wrong but this is how i feel about all this. So i asked my mom if i could get the key to my room or a new lock. (She has told me before that she "lost the key to my bedroom" after i asked her for it in the past) and i told her what happened and the first thing she did was ask "what are you so afraid of them seeing?". I have absolutely nothing to hide btw. So idk aita?

Edit: This happened while i was at work the one afternoon. And i just feel like i shouldn't be worried who will come into my room and invade my privacy or snoop when i am not home