Would not recommend this^
It's already too late for you to go back since you already have her plot in your town, so going back won't do anything except place her permanently. Plus you'd have to start up with your mayor to even do a Pwp request so you would have screwed yourself over.
I recommend patience, if she keeps placing herself in an area you don't want over and over, try and "reset" those places by turning off the whole system and starting it over instead of just exiting the game and starting again.
That's what I did for Cousteau. He wouldn't move into the 3x3 spot next to Elvis, but after someone recommended that to me, I turned off the system, turned it back on again and he started plotting closer and closer to where I wanted him and now he's where he should be. Farthest right house under the town tree btw