Hmmm... she may get her way after all then. Just as she has with the worktop, the cupboards, the floor and the walls!
Bolter; that looks pretty good, thanks for the pics

The only problem I see now would be having the weight of the tiles on the wall. They are plaster/skimmed plasterboard which obviously could not take the weight of heavy floor tiles (20kg-28kg/m2 depending on the plaster used I believe?).