Uh, I really didn't notice the weird pig thing. I noticed the comment made by his wife but thought that there was nothing sick about that. I thought it's only where a husband has an obsessive hobby or interest in something and his spouse may say I think he loves <said hobby etc here> more than me because he spends more time on his hobby than with his wife.
I read that book he wrote later in the game but only skimmed through it thinking the guy was just a retard. I didn`t get the idea he ****s Kevin though. There again I didn't read it thoroughly. Now that you mention it, if this the case then yeah it is kinda, well, let's just say strange.