What happens next?

I'm loving writing this unplanned novel. 

When I started it I knew the theme and the setting and not much else. I'm seven eighths of the way through now and I've got to know the characters along the way, as well as how the plot works out. Until three weeks ago I didn't know how it was going to end, but one day it came to me in a flash. And when this conclusion arrived it was all so obvious, because hints had been dropped in the text much earlier on.

Right now, a character from twenty years before the novel started has turned up on somebody's doorstep and I have no idea what is going to happen. I'm just waiting to hear what these two characters say to each other and then I'll know where to take it next. It's so exciting!