I think if anything Jay will dump her once he's got a few shags out of her/ maximised mag deals. I can't believe I will write this, as uncerebral and loutish as Jay is, I don't think Louise is intellectually stimulating enough for him in the long term. Jay may not be brains of Britain, I do think one of his few redeeming features is that - aside from poo - he does one or twice seems to have more than a passing interest in the world eg his assertion that he will have 'sauna' chats with Aaron about the universe/ marine life.
If Aaron had been a hot woman Jay probably would have fancied her
When Aaron was teasing Faye in the bed about losing the wrestling match to Tom, Jay seemed to be looking on wishing he could have that sort of banter with Louise.