Gut feeling or just paranoid?

My friends are staying over, my uncle is a supervisor at a hotel. The thing is that he offers them a part time job since he needs more people and that they could use the extra money, I haven't been comfortable recently with my uncle and my friend's wife, like there is a vibe or something, my friends go to work by train but my uncle if he's going second shift and also this woman he would come pick her up, so I don't know the two of them alone in the car, and sometimes she talks a lot about my uncle. I know is none of my business but I feel weird. I'm not sure about this and I'm always been anxious.