I agree with LostGeneration. Mix marriages are very common in most churches. They just generate more strain when one party is a JW, because the JW are so obnoxious.
This is one reason that JW make no sense to most Protestants. We deal with these sort of issues all the time without many problems. We learn how to manage differences of opinions. It is only when you throw a JW into the mix that you encounter real division and strife.