Well, it could be that mom always wanted a daughter. Maybe she started by dressing you in girl's clothes. She might have thought it was cute or perhaps she was trying to fulfill some unfulfilled dreams of her own from when she was a girl.
It could also be part of a cultural or family tradition. In some cultures, there are practices where boys might be made to experience certain aspects of being a girl for a short period. For example, in some theater traditions, boys play female roles and have to be trained in a 'girl - like' manner. So, mom could be influenced by such cultural elements.
Well, it could be due to her own dreams or wishes for you. Maybe she always wanted a daughter and tried to influence you in a way that made you more 'girly'. For example, she might have dressed you in girls' clothes, encouraged you to play with dolls, or involved you in activities that are more associated with girls.
One possibility is that she has a strong sense of gender fluidity and wanted you to explore that side. She could have started with small things, like changing your hairstyle to a more feminine one. Then she might have given you feminine accessories like earrings or bracelets. Another factor could be that she was influenced by some pop culture where gender - bending is a trend. So she thought it would be interesting and fun to transform you into a girl - like figure.
One possible reason could be a magical accident. Maybe mom was trying to do something else with a spell or charm and it backfired, turning the person into a girl.
Well, it could be due to some kind of magic spell. Maybe a mischievous wizard or witch cast a spell on you for fun or as part of a larger plan. Another possibility is that it was a scientific experiment gone wrong. Some crazy scientist was messing with genetic or molecular stuff and accidentally triggered this transformation.
It might be due to some scientific experiment gone haywire. In a fanfiction world where science and ninja techniques are combined, an experiment that was supposed to enhance Sasuke's abilities could have had the unexpected side - effect of changing his gender. This could lead to all sorts of interesting plot developments, like how he copes with his new physical form and how his relationships with other characters change.
This could potentially happen through various means in a fictional context. For example, if it's a story about magic, a spell might have been cast wrongly. Maybe a mischievous wizard or witch accidentally turned the son into a girl while aiming for something else.
Perhaps she was influenced by her own upbringing. If she had a great relationship with her mother when she was a little girl, she might be trying to replicate that with you. She could also be doing it as a form of protection. By making you into a 'baby girl', she might feel like she can shield you from the harshness of the outside world in a more motherly way.
I'm not sure if there's a common story like this exactly. It could be some sort of magical or fictional story. Maybe the mom had some special powers and accidentally or purposely turned her son into a baby girl through a spell. But without more context, it's hard to tell a specific story.
Xander's transformation into a girl could lead to some really interesting self - discovery. He could realize that gender is more fluid than he thought. He might start to question traditional gender roles and expectations. He could also have some romantic adventures. Maybe he starts to develop feelings for someone who he never would have considered before the transformation, or someone might develop feelings for him in his new form.
It could be that the mom was reminiscing about the child's baby days so much that she wished for it and some magical entity granted her wish, turning the child into a baby. In this story, the mom then has to relearn how to take care of a baby, and there could be a lot of comical moments as she tries to adjust to the situation. For instance, she might forget how to change a diaper properly at first.