So I just got home from my walk and I'm sitting on the couch and all I hear is this faint meowing. I…

So I just got home from my walk and I'm sitting on the couch and all I hear is this faint meowing. I get up and start searching for where it's coming from. So I found one of my cats locked in my son's closet. Poor cat. My son leaves for school at 8. So she has been in there for almost 4hrs. I feel so bad!