Lets say it costs you $200 to change em now, chances are by the time 95000 is up you may have even sold the car by then! (well I only drive 8k kays a year normally)
I say do em now for a piece of mind, otherwise as you said she drives fine don't worry about it. Either way you can't go wrong really
FWIW BMW Melbourne changed the spark plugs on my car @ 70k kays according to the log book.