Parents often want the best for their children, thus acting in "intrusive" ways that end up causing friction between them. It's never easy for a parent to see their child suffer; when that happens, they typically find ways to ease the pain.
One of the hardest parts of growing up for involved parents is dealing with growing up, and maturity as their children discover themselves. This Reddit user faced a dilemma when discovering her daughter was a bullying victim in freshman class.
It didn't help that the bullies highlighted a non-issue and turned her daughter into a shell of herself.
Read Am I The A-Hole for more information.