Oh boy! It seems like your post has hit a nerve! I also have a similar story. I made a gorgeous (I thought) Christmas star wall-hanging for my sister. She promptly put it on a side table as a table cover then put her coffee cup on it. Ouch. I think I was too shocked to say anything, but I wish I had. It still hurts. I'll never make another thing for her.
Hey, I have an idea. How about sending your dad the link to this discussion?
Your quilt is absolutely wonderful! Keep up the good work!