Is a wife sinful if she refuses to help her husband care for his children from his divorced wife, despite her attempts to deal with them kindly, and her feeling of aversion towards them due to the insistence of the husband and his family on involving them in her marital life, and is she entitled to refuse to be present with them?

A wife is not obligated to serve her husband's children from another wife. However, she does not have the right to object to their visiting their father in his home. She may go to her family's house during their visit if her husband grants permission; otherwise, she is not allowed to leave except out of necessity. It is recommended to strive against one's desires and to welcome the husband's children kindly and treat them with gentleness, especially if the husband is good in his companionship.