I'm sure you are correct in your assertion about what feelings regarding fatherhood that AJ had towards each man. Your post just stuck out to me because my husband calls his Mom and Dad by their first names and has his whole life. It struck me as odd at first to hear him say "Mary and Glenn" when talking about or to his parents, and I wondered at first if they were not that close.
But, that is not the case at all; Chris is very close to his parents.
So, I think AJ calling Wes "Wes" probably had more to do with the fact that she was now on her 3rd father figure (not her fault), and she already knew of her bio dad but had nothing to do with him, had Zach for several years and called him "Dad". And, for whatever reasons, (also not her fault) her relationship with Zach was not ideal after the divorce. So what does a girl, especially with a teenager's mind, decide to call her 3rd go round with a father? I'm guessing she probably wasn't terribly gung ho and optimistic about how this one would work out, not enough to put a ton of effort into what she was going to call him. She likely was like, "Whatever, screw it. I'm running out of dad-type names, (not her fault, either), so I'm just going to call him Wes."
