Sorry this has escalated so badly. It sounds to me as though this lady decided it was a fake before she even received it. Many people are paranoid these days with ebay but she really should not buy if she feels so strongly. For her own piece of mind she should get it verified but she should do that and make a minimum amount of noise in the meantime.
I think the best thing you can do is tell her you are confident it is real and you can not therefore accept a return for authenticity reasons.
Let us know how you get on...
I think the best thing you can do is tell her you are confident it is real and you can not therefore accept a return for authenticity reasons.
Let us know how you get on...