Babies who get several teeth will "try them out" and this doesn't always include biting - they will grind. Teeth feel pretty cool to them. A baby grinding their teeth does not necessarily mean that they will end up with TMJ. Grinding teeth is not even a sign of tmj.(However, since both you & your husband have it, I"m sure the ped already knows to watch out for it.)
I would suggest bringing it up at the next ped visit. The ped can take a look at the teeth and decide if a dentist visit is necessary. Some grinding is more severe than others. At the most, baby will get a protective covering over her teeth later on.