No. Writing or sharing erotic stories about someone's mother, especially a best friend's mother, is highly inappropriate and unethical. It violates basic respect for others and social moral norms.
One time, my friend borrowed my expensive video game without asking. I was so mad that I thought about telling his mom. I didn't really blackmail him in a bad way though. I just said if he didn't return it soon and start asking permission in the future, I would tell his mom he took it without permission. He quickly returned the game and apologized.
One way is through education. Teach people about the importance of respect and privacy. Also, social media platforms and communities should have strict rules against such content to prevent its spread.
No. I've never heard of it in mainstream or popular story collections, and it sounds rather inappropriate and not something that would be widely popular in a proper literary or storytelling sense.
Perhaps a story where a mom is brainwashed by a marketing scheme. She gets convinced that a particular product is essential for her family's well - being. So she spends a lot of money on it, even though it's not really necessary. This shows how she was influenced without any erotic element involved.
By having a strong sense of ethics. Always remind ourselves to respect others and their families, and refrain from having improper thoughts in the first place.
There could be several reasons. One possibility is that they are in some kind of trouble themselves and think blackmailing the mom can solve their problems. For example, they might have debts they need to pay off. Another reason could be that they are just bad - natured kids. They might enjoy having power over someone and see blackmail as a way to get that power. Or perhaps they have some secrets that they don't want the son to know and they are using blackmail to keep the mom quiet about those secrets.
My friend's mom is an artist. One day, she decided to transform their backyard into a beautiful art garden. She painted murals on the fences and planted all kinds of colorful flowers. It was a really hot project as it was in the middle of summer, but she never gave up. The end result was amazing and now it's a place where all of us friends like to hang out and feel inspired.