Comment by King Emina on I'm a Villainess, but I Won't Live Like One - Chapter 14

@King Emina Blame the husband and hate him but don't involve the child because she knows nothing, and she didn't do anything. Also imagine yourself in Maria's shoes, she really is pitiful and at this point, she didn't even do anything yet, she's just existing but the world is cruel to her. 

But if Maria is a bi*** that's a different story.

@King Emina Maria Maria innocent. She didn't ask to be born from an affair. Its then husbands fault, and if anything you should be getting back at him. And doing cold and hard too.  Maria is in no way, in te wrong. Not to mention the father doesn't even care about Maria. And likely adopted her to be sold at the highest price.

@King Emina maria can be pitiful and the marchioness can be justified, or at least understood, in neglecting her at the same time. Unless Maria is being actively abused, no one is really wrong, but no one is really right either. It's just a bad situation all around.

@Rebel against the harem it does seem very much like he's packaging her up and tossing her out in a way that leaves his hands looking clean to outsiders.
He can't deny she's his, and not taking her in would make him look like a villain.
I don't think it's so much selling her, as getting rid of the problem quickly so it can be far away and forgotten about.
He's the only one in the wrong here.
I pity her, she isn't to blame, in this, but I can't fault the marchioness for being angry, or her actions because it looks like she is providing for Maria, but is refusing to play mother accept her Maria as her own daughter. If she prepared the debutante arrangements it'll look like she's tolerating what he husband has done. In her shoes I'd be wondering what else is going to crawl out the woodwork.
I took it that those comments  and actions were aimed directly and pointedly at her husband, not Maria.

I only have a son. That is your daughter, not mine.You deal with it. I refuse to.

She's drawing a very clear line that she is not going to tamely accept nor forgive his indiscretions.
She isn't going to smooth the situation over for him and fix it and he's taking it out on Maria.

@King Emina A lot of the main characters of these isekai are abused because they are illegitimate, I don't see people to complain and say it's okay when it's the main character to suffer