Here is another rant, in case you are interested.
Ranveer needed permission from Abhyanah to love Ragini, as it might in the future hurt his beloved wife. But Isha could love her abusive husband, despite her brother disapproving of it.
And she was angry at the her brother to the point of throwing her brother in front of her husband's wild pets.
In the beginning of the story, she loved and cared for her abusive husband when he gave zero reasons. Although he did change slightly in the course of the story but he did not develop as an individual. Which is shown by highlighting in the story where Isha was pregnant and he was asking his wife's therapist, how to restrain his anger issues. When clearly he needed therapy but he was adamant not to change for better.
At multiple occasions, he declared that if his kids would be disrespectful to his wife then they would bear the consequences. I, by no means, am stating that kids can be disrespectful towards their parents and get away with it. But we all know how harsh he is, Isha would go all blushing mess. Like she literally knows, what new levels of rage he could unlock.
He may not go all physically abusive but still he could go harsher to the little poor kids, just to keep the promise of no one disrespecting the queen. Even at the cost of harming his own children.