Sorry to hear of your problem...
Hopefully your insurance company wipes the floor with her, but usually it comes down to who the biggest liar is...
I had the misfortune of a tw&t in a scrappy old Rover hitting another car, the central reservation then into the back of my car back in 2009... Even though I hit nothing "Mr Rover" pulled out 2 witnesses and I had to carry the can!!! The wheel fell off his Rover and he had the nerve to say I'd recked his car!!! He got £3000 for his car and injuries to himself, pregnant missus and the kid in the rear...
All I had was a scuff on the unpainted rear bumper a slight mark on the painted and a slightly damaged alloy, I didn't claim just did it out my own pocket, my insurance was just up for renewal had the quotes already <£500 as a result of what happened I had to pay just under £2000...
I was with Equity Redstar at the time who even though I sent pics of the damage to my car/investigator looked at it ect they didn't even try to contest it, that's why I pulled the plug on Adrian Flux, fleapit companies you can see why they're so cheap...
First day with my new insurer and some old bloke in his 70s called Maurice with a sheepskin jacket!!! hit the back of me in his new Lexus!!!... I didn't claim the lower bumper was already damaged and his numberplate was just cracked... To be fair he gave me the money for the new lower bumper to be replaced and fitted...
Last week some newbie young teen with the old "P" (Prat plus) on her scrapper old KA with more rust than the Titanic nearly took the side off my car by thinking she could go all the way round the roundabout on the outside and take the 3rd exit !!!
Although saying that "Mr Arrogant Cockgobbler" oblivious to any other vehicles did the same days later in his company car BMW but then what you expect!!!