@Tearsax Well there is a heavy deference given towards elders and older family members in Asian societies in general, so that is true. Asian societies are very traditional, so the son would be expected to afford the stepmom with the same respect he would give his own mother. However, this is changing in more modern societies like Japan, and the situations these types of stories present are definitely outside the norm. I think these stories just want to emphasize the whole "he's cucking his dad" aspect, even while they make sure the stepmom in question is not that much older than the main character, both because that means they can be hot, and to make the dad look like an old creep chasing younger tail so you don't feel as bad for him. I remember this one manga, which I for the life of me can't remember the name of right now, where the Father, who is portrayed as a right asshole, married his son's goddamn
girlfriend, who chose the Father over the son, and said father promptly starts treating her like shit, just like he treats his son. Can't remember the title, but its a work about a guy who takes care of an alien girl, who the dad wants to kidnap and hurt too, because he's just that much of a dick and wants to make his son's life miserable.