It might be part of a creative play. For example, if they were acting out a story or a scene from a fairy tale where mom was playing a character that needed to be on the 'lap - horse' or something similar. This kind of play helps in strengthening the family relationship and creating shared memories.
One day, when I was a little kid, we were playing a game. Mom pretended to be a knight on a horse and she sat gently on my lap which was like the horse. I giggled as she made funny horse - neighing sounds. It was a really warm and fun moment that I'll always remember.
One possible reason could be that there is not enough space in the vehicle. Maybe there are a lot of bags or other items taking up the seats, so mom has to sit on son's lap as a last resort.
In some cases, it could be out of necessity like in a crowded situation where there are not enough seats. But it can also turn into a special moment. The mom might start a conversation, share memories or just enjoy the closeness with her child.
It can show closeness. In a family, physical closeness like this can signify a strong emotional bond. It shows that they are comfortable with each other.
One possible reason could be for medical treatment, like if she had to undergo chemotherapy. Chemotherapy often causes hair loss, and some people choose to shave their heads preemptively.
Perhaps it's a story set in a cultural context where such physical closeness between a mother and son is a normal display of family love and bond. It might be during a family gathering where the mom casually sits on the son's lap while sharing some family memories or news.
Maybe she was trying to share a nostalgic memory. For example, she might have been reminiscing about a special occasion when she wore a particular lingerie piece, like her wedding day. It could also be a way to bond with you, showing a more personal side of herself.
One reason could be that you had some sort of physical problem. Maybe you had a minor injury that made it difficult to get to the toilet in time.
Perhaps you didn't do your homework or chores as you were supposed to. Moms usually want their children to be responsible, and when they aren't, a spanking might be seen as a form of correction. For example, if you repeatedly ignored your mom's requests to clean your room, she might have resorted to spanking to get you to understand the importance of following instructions.
At a family gathering, they were all sitting around a small bonfire in the backyard. There were not enough chairs, and the son offered his lap for his mom to sit on for a while. They started sharing stories from their past, and it was a really warm and bonding moment between them.