Let them go. You're still in control, but your subconscious is doing all the heavy lifting, and that's actually how almost all of us write who don't outline. It's a Good Thing. With rare exceptions from truly brilliant writers, few things bore me more than pre-plotted novels where the writer guides the characters through a strict course every step of the way.
Let the characters run, play, get into trouble, go where they will, do as they wish. It's your own subconscious guiding these characters, and chances are it will do a much better job than the preconceived course your conscious mind wants to dictate.