Maybe she wants to get attention. Sometimes people lie to make others focus on them.
It could be that she is trying to protect someone. For example, if the little girl actually ran away because of some family issue, she might lie to cover it up. She doesn't want others to know the real situation which might be shameful or harmful to the family.
There is also a possibility that she is just a habitual liar. Some people have a tendency to lie without a very specific reason. In this case, she might make up the story about losing the little girl just for the sake of lying. It could be a part of her personality disorder or just a bad habit she has developed over time.
One possible reason could be to gain sympathy. Maybe she wants people to feel sorry for her and pay more attention to her. Another reason might be to cover up her own negligence. If she was supposed to be taking care of the little girl and lost her, lying could be a way to avoid blame.
One reason could be to avoid unwanted attention from guys she's not interested in. If she doesn't want to deal with someone's advances, saying she has a boyfriend can be an easy way out.
It could be that she has some personal insecurities related to being ticklish. Perhaps she has been teased in the past because of her ticklishness, and now she doesn't want to admit it. Also, she might be trying to keep a certain image, like being tough or unflappable, and admitting to being ticklish would go against that image.
Well, one reason could be that your mom always wanted a daughter. Maybe she had dreams of dressing you up in cute girl clothes, doing your hair all pretty. Another reason might be cultural. In some cultures, having a girl is seen as more desirable in certain ways. Or perhaps she just thought it would be a fun experience for both of you.
Maybe in the story the girl sees it as a form of attention. Sometimes children might misinterpret discipline as a way to get their parents' focused attention. If the mom is often busy, the girl could think that getting spanked, which is a form of interaction, means her mom is paying attention to her.
It could be a simple mistake. Maybe she was in a hurry or got the wrong clothes out. But more likely, it's about breaking gender norms. In today's society, there's a growing movement to question and challenge traditional gender roles. The mom might be part of this movement and wants her son to grow up without being boxed in by what society deems as'masculine' or 'feminine'. She could be using this as a way to start conversations about gender equality at an early age.
One reason could be that she was too engaged in the party activities. For example, if she was playing some active party games, her clothes might have come off accidentally. Another reason could be that the clothes were not fastened properly. Maybe the zipper was loose or the buttons were not done up all the way.
One reason could be that the mom always wanted a daughter. Maybe she had dreams of doing girly things with her child like shopping for dresses or having tea parties, and she thought this transformation would fulfill those desires.
One reason could be to add a comical element to the story. It might be a way to show the competitiveness between the two characters in a light - hearted and exaggerated way.
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.