Oh Mary -
I really feel for you....Kids - we love 'em, but I bet you were "fit to be tied" as my mom used to say.
Funny, I remember that saying being used a lot growing up.
My mom was a writer, and I don't think I ever messed up any of her manuscripts but I am sure the difficulties and frustrations in raising kids and practicing your craft are the same in any discipline.
Anyway, I'm so sorry you have to start over. But I bet the second painting will be even better!