They'll do it to you every time.
We're having a new fence installed today. I hired a company two weeks ago and we laid out the plan for the fence. I'm really impressed. The company showed up right on time and already has the posts in the ground. Mom has been letting me plan and work with the contractor...
... until today. She decided that she didn't like where the fence ends and where the gates are. I told her that it was too late, that the time for the input was before the work was done. We had some trees we had to work around, which is why we designed the fence this way. Now she is mad at me because I should have had enough sense to know where the fence should go.
To tell the truth, I knew she would start getting mad when the work started. And I know she won't be happy with the fence when it's finished. After a lifetime, I know how these things go.
Sad thing is that I was so happy about getting the new fence. The old metal one was in tatters and was depressing. Now it has turned into a thing of stress. I suspect that I may end up paying for it myself. That is okay, I guess, since to me it will be worth it to have a nice fence with pretty, wonderful smelling wood.