I dunno but if a client threaten to sue..I know a lot of corporation will cease contact with the customer immediately and only will acknowledge contact with their lawyer. I find people who throw the "lawyer" card more inconsiderate people and really no matter how much you try to please.. they are never satisfied. If she threatens lawyer again I would suggest OP to only talk via their lawyer and not her. I'm pretty sure she has bad mouth you already if she ask you to sit with another "photographer". Don't give into her demands..she wants the world for the price of $0. GL and maybe you can suggest she calibrate her monitor?