Yes, that is the dictionary definition, but I made a point that the dictionary definition has nuances to many people. For many children, there is a big difference between "the woman who is married to my father and whom I see occasionally on weekends when visiting him", and "the woman who is married to my father and whom I live with on a permanent basis, either because my biological mother is missing or has been denied custody over me". Most people I know in those situations call the latter their true stepmothers, whereas the former are simply "my father's wife" or, sometimes, even "the woman who lives my father". Again, personal experience here.
In any case, Woolfie lives with Edo so that changes the equation.
It is pointless to argue because we have different POVs. Haakon of course is Marius' stepfather as he raised him, paid for his education and quasi-royal upbringing, and is even getting him jobs these days. Yes, he was a de facto replacement for his biological father even if the biological father was part of Marius' life.
On your other point, I was just commenting that your reasoning is illogical. If you are concerned that Edo should not parade multiple women in front of his son, then the best solution is for him to get settled with one woman, e.g. Beatrice, for the foresseable future (we can't guarantee it will be "for life" and that is not necessary). The fact that Edo lives with Woolfie makes it even worse if he brings multiple dates home and they meet his son. And, yes, a man who dates multiple women and has frequent casual flings is promiscuous, especially at Edo's age.
Yes it is pointless to argue with someone who Invents their own dictionary to suit their purpose. Perhaps one day you will publish your dictionary
Until the day you publish a dictionary recognized, I will go by the legal definition of a stepmother:
By definition (the Cambridge English dictionary)
B2 the woman who is married to someone's father but who is not their real mother
Simple as that. Nothing about raising the child. Simple marriage to the father.
Now what they call their stepmother may be based on their relationship. Like if your mother died or is not in the picture, and your stepmother raised you, may end up calling her Mom. Others, like when their mother is very much alive or if their dad got married when they were adults, would call the woman by her first name. That is another matter all together. No one here is suggesting that Beatrice would become Mom to the kid.
Marius had a dad not a 'biological father'. A dad who was very active in his life. He was lucky, he had a dad and a stepdad, both who took an active role in his upbringing. Some kids aren't fortunate to even have one. Haakon doesn't diminish the role that Marius' father had in his life.
My reasoning isn't illogical. Your idea of dating seems to date back to the dark ages.
If Edo was sleeping with different women every night, that would be promiscuous. If he was going on dates, not settling down with woman, that is well being Single. He is 34, not 50. He doesn't have to date for the purpose of marriage. He can have fun and date until he finds the right one.
Nor would he be parading the women infront of his son. No one said he would bring the date home. He could take her out for dinner when his son was with a baby-sitter or with his mom.
Single parents do it every day. Most single parents don't introduce their children to every date. They introduce them when they have become more serious and see a future with them. If he is moving in with Bea, he is obviously serious. And unless he only wees Wolfie in public, Wolfie obviously would meet Beatrice.
The LOGICAL point me and several posters made, before he introduces Wolfie to Beatrice, it would be best he was serious and planning a continued relationship with her first.