How to deal with stealing money from relatives?

I just came here to talk about something that happened to me: a little monkey was attached to my car basket. One day, I found that the little monkey was missing, but it was attached to my friend A's car basket. I don't know what to say. There is no evidence. If she stole from me, she must argue that she bought it herself. I was silent all noon, and I had nothing to say when I went home by car together. . .

Then I went home with her in the afternoon, and another friend B came to pick up the car. B glanced at the little monkey in A's car basket (B also knew that the little monkey was mine, but he didn't know about it before), looked at me and looked at A again ... Wow, it happened! B didn't say anything, but reached out and tore the little monkey off and slammed it on my car basket. It was a moment. Completely silent, A didn't dare to say anything, acting like a guilty conscience. Then everyone goes home separately. I didn't say anything, and I know it. ...

If that happened to me, I would suddenly criticize it. She has a bad conscience when she mentions it from time to time. I have a bad temper.