She seen the error but thought she could get it out of you. You would be surprised how many people out there are big scammers. I know of a lady that purposely goes out of her way to get a "deal" all the time. She will order (2) pizzas with 6 items. When the delivery guy comes to the door, she quickly opens the box and explains that it is the wrong pizza. He waits at the door while she calls the rest., explains she didn't want such and such on the (1) pizza (even though she did order it), they let her keep the (2) free, plus they deliver another (2) and she smirks when all is done and says "BONUS, I have lunch for the rest of the week at work"! She hasn't paid for a video rental in two years. She will check out the New Releases and make sure their all rented, go to the teller and explain she wanted that movie, so they issue her a "rain check". Believe it or not, this is the story of her life and I'm sure there are numerous others doing the same thing. If she wanted your products bad enough, she wouldn't be complaining and requesting a 50% reduction. She would be understanding and except the 10-15% you had originally offered her. Don't try to pacify this woman as I can see, once she receives the product, she will try to find something wrong so you will issue her more free products. Trust Me...I had a retailer try to pull that one me.