Is your dog a tattletale?

My sister has a GSD and a Golden Retriever both females. Sophie(GSD) tells on Lucy(Golden). Ex: Sophie got a new bone for her B-Day and Lucy took it. Sophie ran and got my sister and whimpered towards Lucy who was happily chewing the bone (she didn't want her own bone). Sophie also tells on Lucy for getting on the bed (my sis doesn't mind). She runs and get my sister and takes her to see Lucy on the bed. I think it's kind of cute. Does anyone eles have a tattletale dog?