I found weed in my aunts room; what should I do?

I was looking for her computer cuz I had to work on my book report, and I saw this iffy bitty tipper container full of weed on her nightstand; what should I DO!? My mom will kick my aunt out if she finds out my aunt is doing drugs; I don't even know if it was her drugs or not, but like what if she gets arrested!? If I tell, will my aunt accuse me of smoking some of it? What if I get in trouble for having been in her room in the first place? What should I do!? :(