Missus Powell's romantic arc is set at the very end of the game. There will be a whole host of changes, new characters, and new plots to explore before then. I only mention that she has content in the future because there are many interested players that are trying to see if she's a character that they should be investing a personal attachment with. I do have content planned, but I have implemented almost none of it into the game because it is a very, very long way off. I wouldn't worry about it anytime soon.