Another point:
The fact that you question if you should take the Girl you feel enough for that she can be your wife’s side against a 3rd party shows that you have a different concept of what a marriage should be then most people (and probably the girl that you are dating). You ALWAYS take her side against a 3rd party ALWAYS. You can discuss with her privately how you think she may have misunderstood something said by someone or whatever, but if someone makes her uncomfortable that person is WRONG and she is right. You choose you spouse over evreyone else in the world. That’s really the whole idea. The idea of a marriage is that it’s you two “against” (I’m using the term loosely) the world.