God, I love Carrie and Brodie together. It's fucked up, but I love it!
It has to be building to something good, since they're going so fast. You wouldn't get something so apparently massive out in the open so soon, unless something better was coming along, surely.
Or, they took it to a heart a bit too much about the pace lagging a little bit in season one, and are overcompensating a lot!