I would meet her with a freindly attitude. ( only to get the job finished and get paid) . Apart from the Richard III in the bog, I bet she doesn't like the tiles, so your getting the stick.
Swallow your pride and start with, morning mrs blogs, I'm sorry your not happy with my work, I will change anything your not happy with. At my cost.
I know she's a nutter, but most people will respond better if we are a little less precious and a bit more humble. She is obviously confrontational, and if you are, your not going to get any job satisfaction or get paid.
try this (with a smile) and see what happens. You have nothing to lose.
If this doesn't work, get some rockwool insulation and sprinkle it in here knicker draw.