My side and their side

Why when I set a boundary does it seem that I feel I need to apologize? I agreed to help build a friends website. I said up front we need to be careful to think things through so I am not constantly making changes. Write it out on paper exactly what you want the screens to look like. Of course that started out and then there were changes & changes. She wanted to watch me while I worked. This morning on a walk when my friend was complaining about her husband I took the opportunity to put up the boundary. One more redo and I was done. She had to look closely at the site and then mark-up her changes and that was it. Of course she had a million reasons and defenses why the redo's had been happening. Which don't matter. From now on no more. And of course she is rushing again and said on a phone call tonight that she would come over and we could go over the new pages. I didn't nip it then but I called back and said - no going over the hand-written. Either it was self-explanatory or it wasn't. I said I don't learn when people talk - I learn when I read. They (she put her husband on the phone) to say why this won't work. It was like an argument. Her - "how will you know where to put which picture?" me- "write down the filename.jpg". I don't get how demanding people can be. You are getting free work so agree to what they say. No excuses. Why am I the one saying "no worry" when it is my time that is being wasted. I promise myself that I am not going to let her waste a half hour of time going over the pages tomorrow night. Let's see what happens.
xox