One possible reason could be discomfort. Maybe the panties are made of itchy fabric or are too tight. Another reason might be a sense of rebellion against what she perceives as a strict rule. For example, if she feels that her parents are always forcing her to do things a certain way, not wearing panties could be her small form of resistance.
Perhaps she is going through a stage of exploring her independence. Wearing panties is a form of following a social and parental norm. By refusing, she is asserting her own will and trying to make decisions about her own body and clothing choices, in a rather innocent way of course.
She could be influenced by her peers. If she sees other kids not wearing panties under certain types of clothes, like loose shorts, she might think it's cool or more comfortable and want to do the same. Also, it could be related to her own sense of body awareness. Maybe she doesn't like the feeling of having something constricting around her private area.
Parents need to educate her about the importance of wearing panties in a proper and age - appropriate way. Explain that it's not just about following rules but also about hygiene and feeling clean. But always keep the tone positive and understanding, rather than being overly strict or scolding her.
Maybe it's a case of extreme confusion or a very strange misunderstanding. For example, in a story where there are some magic or supernatural elements that mess with the mom's judgment, but still, this is a very abnormal situation even in a fictional context.
In the story, she could be making a statement about modern relationships. She wants to be completely open and honest with her husband about her body and her choices. By not wearing panties, she is showing that she trusts him completely and that there are no secrets between them when it comes to her physical self.
It's a rather personal choice. Some might argue it's inappropriate in public settings as it goes against social norms of modesty. But in a private, comfortable home environment, it could be about personal comfort or a form of sexual liberation within the relationship. However, in public, it can make others uncomfortable and may violate certain decency laws in some places.
It's not a simple matter of being appropriate or not. In different cultures, the perception varies. In some Western cultures that are more liberal, it might be seen as a bit of a risque but not completely unacceptable behavior in certain private situations. But in more conservative cultures, it would be considered highly inappropriate. As for reasons, it could be related to body comfort. Maybe she finds traditional undergarments restrictive and just wants to feel free.
One reason could be a medical condition. For example, if someone has a skin allergy to the fabric of panties, it would make wearing them uncomfortable or even painful. So in the story, the character might be dealing with this itchy rash every time they try to wear panties and thus can't do it.
It could potentially be part of some very dark and inappropriate power - play in certain extreme and unethical fictional stories. However, this is not acceptable behavior in real life.
Another reason might be related to protection. Panties can act as a sort of shield. For instance, if I'm playing around and might accidentally sit on a rough or dirty surface, panties can provide some protection. Mom is always thinking about my well - being in this way.
Maybe it could be some sort of power play in a really dysfunctional relationship. The wife might be trying to assert excessive control over her husband.
One possible reason could be due to a medical condition. Maybe she has some bladder or bowel control issues that the adults around her think are best managed with a diaper for the time being. However, this should still be done with her understanding and cooperation as much as possible.