Call her a RAT! Seriously, putting someone else's business out there is rat behavior. No one should be volunteering your time for anyone else. It's like Brenda walks by and sees you have a hairbrush on your desk. Then someone in the office is like "Does anyone have a hairbrush I could use?" Then Brenda yells "OP Does, I saw it on her desk." Now instead of simply ignoring the hairbrush question you have to now come up with an excuse as to why you don't want someone else using your hair brush. All because Brenda decided to put your business out there.