ANSWER

He is sinful and will be punished for not being equal with both wives and for obeying his first wife like this as it doesn’t matter whether he has children or not as this won’t exempt him from accountability and will come on the day of judgement with his side tilted for being unfair.

https://islamqa.info/en/answers/10091/how-can-he-treat-his-two-wives-fairly

https://islamqa.info/en/answers/102446/obligation-of-treating-co-wives-fairly-and-some-of-the-rules-on-travel-for-men-with-more-than-one-wife

What to do if a man marries a second wife and the first wife does not allow to visit wife equaly. So the second wife is always alone, because the man says he has to do what the first wife says becaus of his children and he thinks this is equaly and right for him. Amd he says this is also islamic right und equal because of the children.

Fiqh of Marriage, Kind Treatment of Spouses | August 9, 2022 5:56 pm
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Told my brother that in marriage the father has to propose to the groom..He said yes muhammad(SAW) conducted fatima marriage like that..But here in Bangladesh it doesn’t happen like this..qazi ask the father if he approve the marriage of his daughter with the guy..after the father’s consent the qazi ask the groom and he says yes..did he committed kufr by not following prophet hadith after knowing
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I have a question regarding my mum and my husband’s treatment of my mum. I understand that islamically he is not obliged to obey or do anything for my parents but does it mean he can treat my parents like dirt and can get away with it? My mum looks after our baby while i work but he treats her not in a nice way at all.