<human>: Can you condense the text into a few key points?

Obviously we've known each other for 21-22 years.       
           
So my brother and I live together and our cousin comes over a lot to hang out, etc. That's fine. But we've started noticing our coin jars are slowly getting drained of quarters that neither of us took out. The only time it drains is after he is gone for the day from visiting. I've heard him shuffling coins before while I was in the living room but I felt kind of weird saying anything. From there, I attempted to hide it but he constantly finds it and steals from it. Also, he's probably stolen atleast 50$ in quarters over the past 3 years.         
          
It's really very awkward and I'm not sure how to go about ending this behavior. We've all been really close our whole lives and I don't think either my brother or me want things to go sour.         
         
Any tips on how to resolve this without losing a friendship/angering him?
<bot>: Cousin has been stealing coins from our coin jar for a few years, don't know how to go about ending this behavior. Attempted to hide our stash but he continually finds it.