It's not appropriate. Such stories often involve private and potentially inappropriate family relationships that should be respected and not made into a form of entertainment for viewing.
One interesting mom and aunt story could be when my mom and aunt were young, they once decided to bake a cake for my grandma's birthday all by themselves. They mixed up the salt and sugar though, and the cake was a disaster but it made everyone laugh.
I don't have any specific stories about mom and aunt's feet offhand. However, it could be something like a story of how mom and aunt used to walk long distances when they were young, and their feet carried them through all those adventures. Maybe they walked to the local market every day, and their feet became a symbol of their hard work and determination.
In most legitimate and well-written stories, such characterizations of mom and aunt would be highly unlikely and out of the ordinary. Stories usually focus on more meaningful and positive aspects of characters.
Rather than seeking such abnormal fictional stories, we should focus on positive family relationship themes such as family support and mutual understanding in literature or stories.
There are very few, if any, mainstream 'mom anal stories' in proper literature. Most literature focuses on more positive, family - oriented or complex human relationship themes that are not of this inappropriate nature.
Well, without more context, it's hard to say exactly. But it could be stories about a mom trying a new form of exercise for the first time that focuses on the anal area, like certain yoga poses that target those muscles. Maybe she's starting a new fitness routine and these are her experiences.
One possible story could be that the son found out some secrets about his mom and aunt, like a financial misstep in the past. He then tries to blackmail them by threatening to tell the rest of the family. But this is a very unethical behavior.