Another imaginary reading of the story: On their return, our hero realised he made a huge mistake by bringing the girl back to States. He was being a fool while enjoying his honeymoon period and made a regrettable decision. He realised he can't be a tourist in Texas anymore and life is expensive and quite different. In the meanwhile, the girl was in her WL/ML mindset; take me out, etc.
So, what's the best way to get rid of her?You know the rest of the story!

I struggle to understand why people are willing to get married and bring MLs/WLs with them home. I am sure they might have a good reason!