The Bible says divorce causes confusion.
In this case, the new wife is not the step-mother of them, as she did not raise them.
She is the wife of the father. These children, now young adults, are required to honor their parents - and that means both of them, and that means treating this woman, and their in-laws, respectfully. Conversely, the new wife is to respect the children's relationship to their mother.
These are not easy to do, and I would hope that the individuals involved get it through their selfish little heads that they have an obligation concerning this.
Giuliani had an obligation towards his ex-wife. He took a vow. He broke that vow and destroyed the lives of his children and his wife in the process. Perhaps if Giuliani had gotten it through his selfish little head that he shouldn't be cheating on his wife and throwing her to the wolves he wouldn't be having this electoral crisis.
The children are not being selfish. They are being protective of their mother. Rudy was the selfish one. Now he's paying the price.
Crocodile tears.