Wife's kindness to the parents-in-law as an act of good companionship

Q 3: Is it the husband's right that his wife should treat his parents kindly and be dutiful to them even if they are not Muslims? It should be noted that they live in a separate apartment away from his family and she visits them occasionally. We appreciate your advice. May Allah reward you best.

(Part No. 19; Page No. 266)  A: A Muslim woman is required to treat people kindly, whether they are in-laws or anyone else, and this is highly stressed when it comes to her husband's parents because this strengthens the marital bond and helps the husband express dutifulness to his parents. May Allah grant us success. May peace and blessings be upon our Prophet Muhammad, his family, and Companions.