Wow.
I imagine if I were to daub all over my house it would devalue it. But then I'm not a known professional artist. I reckon I could match this standard of art though! ;-)
I read somewhere that the paintings relate to things that are personal to her family. So I'm not sure how someone else living with that would work. Or could you ask her to repaint something else that related to your own family? Really get value for money from that £2,000,000.
I quite like her actual artworks; a riot of colour nicely constrained within a rectangle....