In addition to the insurance company having heartburn with it, if you rent, read your rental contract carefully. Many FBO's prohibit renters from flying right seat.
My advise, before you depart, sitting on the ramp with the engine not running, stick her in the left seat, show her all the instruments, dials, etc, give her a good "tour", but put her in the right seat for the flight.
As everybody has previously stated, it's not a "legal" question but one of liability. Unfortunate, but that's the world we live in.