Whatever it was, I prefer to live in my bubble where their happiness during the first four seasons carried over to S5 & 6.
Season 6 was a ....show, as Carisi from SVU likes to say. Fill in the blank with what you will..
Though I did like the episode where they kissed. I honestly hoped that the kiss was the start of Betty breaking up with you-know-who, and getting back with Jug.