That's not a passive-aggressive face, it is a skeptical face. Says so, right next to it. I used it because I am skeptical.
It is Aibu, we are being asked our opinion, I have given it.
This is not AIBU, actually. As I said above, there is no issue with you giving an opinion, or with sharing what has worked for you. The judgement and thinly veiled attack on 'second families' is what has been objected to.
I do not apologise for being prescriptive in saying that I think parents should consider the needs of their first child before having a second.
You should, though. Apologize, that is. I understand that you won't, because you cannot see what is offensive in your posts.
For a father to consider the needs of his older children absolutely does not require a discussion with an ex.
You imply - rather more than an implication, in fact, that it does, and that those of us who make a responsible decision - to have children within a committed relationship, for which we can provide - do not have all our children's best interests at heart.
Obviously if a parent is dead you can't discuss things with them, that goes without saying. I feel a little daft even having to say that. But in the OP situation the parents were alive .
And yet, the logic is exactly the same. The ex has nothing to do with this, right - it is all about the best interest of the children, isn't that your position? So what difference does it make, to your spurious position, if she is alive or dead? If it is not in my DSCs best interest to have a sibling that takes away from the available income, that's all that matters - right?
What if my DH's first wife asked him, as she did, not to marry and have more children? Her wishes at the time were pretty clear...so what? She doesn't have a say, and she wouldn't have a say if she lived around the corner and had tea here every day. My DH has proven himself able to make decisions for his family and in the best interests of his children. It is too bad that you would require the death of the first spouse to make that acceptable.
(And if we are strictly speaking about the OP's situation, maintenance was never an issue in her post, don't forget.)