Caddy, Quentin and the Old South

As I read Quentin's section, I thought his relationship with Caddy was creepy and just didn't know what exactly to do with it. Now looking back, thinking about his obsession with time and the Old South, maybe he's just overcompensating. This might be far-fetched, but maybe he's trying to utilize her as a vessel of sorts to become that southern gentleman he desires so much to be. If she killed herself it would have salvaged the Compson name, so he tries to strike a deal with her so they'd do it together. He then pretends to be the father of her child as a desperate attempt to save his sister's reputation. In both of these situations he is sacrificing his life, either literally or figuratively because for a southern gentleman it was all about the reputation, manners and whatever other standards they had. He's almost trying to be a martyr for his sister, who is the epitome of taboo for someone who holds the old south so close to heart. It's kind of sweet if you think about it because he's just trying so hard to be there for his sister, but it comes across as sick because he is going by the standards of a time period which just doesn't exist anymore. He just can't exist in this world. I might be really off.