Charlie came home from work last Friday, and I could tell he was a little thrown off. Usually, I got dinner all set out for him. “What’s up?” he says, staring at me with my coat on and ready to go. “Don’t you remember? Caitlin’s art opening?” “Oh, Jeez…” Clearly, he hadn’t. “Come on, Charlie. It’ll be good for us.” See, my niece Caitlin and her boyfriend Adam are part of this group art show at To Bean or Not to Bean, Mahoosuc Mills’s very own coffee shop and performance space. Just opened up in one of the old mill buildings last fall. I don’t think they’re going to put the Busy Bee out of …