If that's true, then the theory that UT wouldn't allow UH into the conference would seem to be not factual, unless the A&M official is just making that part up in order to stir the pot.
Not exactly sure on the theory you are talking about as I've been working all morning and won't be reading through all 500 posts of this thread.
But I wouldn't think any Big 12 member would be in favor of adding Houston. Why would you? That can't just be a Texas thing.