Okay, I taught a friend how to use her camera and gave her some pointers on photography. She was supposed to help me shoot a rehearsal and wedding at a winery. She didn't show, which looked bad on me considering I had told the bride to expect 2 at the rehearsal and 3 at the wedding. Later she asked when my next wedding was and if she could help me with that one. I explained that after 2 times of leaving me hanging and making me look bad with a bride, that she would have to get her help else where. Low and behold she has opened a studio here instead of 300 miles away like she said she would. A potential bride called me and told me another photographer had a wedding price list exactly like mine and I had her to forward me the info. It was my (thought she was) friend's studio. I gave the bride a link to my online portfolio and the phone numbers of some past brides. Well, she gave me her credit card and booked her wedding. Now, what would you do about the other photographer?
Well the good thing is, I have contracts going back over a year with what is on my price list. Her studio just opened.
hmmm, fork her lawn. too bad she lives in an apartment. oh did i mention she shoots out of her home?

undercut her prices like a MoFo for a few months! Have like a 'going out 'FOR' business' sale, and steal all her potential new clients- you have a huge portfolio by now, I'm sure, and can attract a lot of people. She took advantage of you, so... hey, it's just business... right?