I finally got my mom to give in tonight!!! Do you think that it will still work next time?

My doctor told my mom that I need to gain some weight. He put me on a diet that would help me with the "problem" (its really not even a real problem). And Ive already gained 2 pounds, so I know that I need to go back to my regular diet. Mom and I had a little argument during dinner tonight. I told her that I was going to make myself a small salad and some get some watter, she told me to eat what she made me because it was part of my diet. I refused and I said that if I cant get a salad then I wont eat anything at all. She just said "then I guess you will be sitting here all night because your butt will not leave this chair until you eat". And she finished eating and Is till didn't eat anything and she waited like an hour, then she gave in and told me I could make myself a salad. She said this was unacceptable and that she wont let me do it again. But I don't know..maybe it might still work! Do you think that it will still work tomorrow?