If she is using the pictures stored on her computer ,I dont think you can do anything,but in the future you might try watermarking.As sellers ,Would it make us feel better to not know someone else is reselling our items.I had a VERY expensive Towel Bars(Bathroom Accesories)set,Priced new at $250+(I know ,Who would pay that)Go for $27.00 .I coulnt bring myself to check if he was reselling it.