I get that there are parents who can be a bit pushy or insensitive in their desire to have their child succeed. That said, there is no way the mom should think that tearing up the picture her daughter worked hard on would be right. It's one thing to nag her to study more, but to rip up her work is just mean.
Sadly, not the first time I've heard of such things in reality. I've heard of ones who've had their books, artwork, etc destroyed by their parents, not because they were doing anything bad, but because it didn't fit their parent's goal of what they should do. Pretty much threatening to destroy anything they work on that doesn't align with the "plan". You also hear of those scary cases of parents who schedule every minute of the day their kid lives. People may have varying parenting styles but even prisoners aren't that restricted.