Review Detail of PennieWagner in I Transmigrate as a Single Mother of the Three Antagonists

If you're going to have the MC adopt another child, what was the point if said child is constantly being left out?! So many times MC mentions how she's a mother of 3 (you mean 4, remember the other child?!). Said child disappears and reappears constantly, with 30-40 chapters passing with no mention of where he is or anything. So far she's left him behind in a market, during a raid of rioters, and the in the mountains! Like, I don't understand! The idea of the original storylines protagonist becoming the adopted brother of the three villains isn't bad, I like it! But the the author just continuously ignores or deletes his presence from existence in the story! What was the point? Personally, if I was that child, I'd go straight to the police and report my adopted mother for abandoned and neglect! Is the author trying to say adopted children matter less than blood-related ones?!