There have been tons of uncomfortable video game controllers though. The N64 was awkward at best, the original behemoth controllers they had for the xbox, that weird c-stick on the gamecube... hell, the NES controller was just a rectangle with buttons.
With such a huge user base over all systems going back for however many years and how we've never heard of something like this, I can't believe that playing the PS3 was the sole reason for her problem ... however much i'd like to