I agree with this. Some people are going to be very generous and some downright mean, even to their own customers (there's a local person who's notorious for this, but probably the most successful caker in town - go figure). If she knew you were baking from home, she may have made the assumption that you were undercharging and that can be very upsetting to anyone who supports themselves making cakes.
HaHa... "some downright mean, even to their own customers "No soup for you!"" Just made the customers want it more. Perhaps I'll try that approach.lol