The World Federation One Stop Fiqh

Ruling 1859

If it is obligatory on a person to meet the living expenses of a sayyid or of a sayyidah who is not his wife, then based on obligatory precaution he cannot provide for her food, clothing, and other obligatory maintenance from khums. However, there is no problem if he gives some khums to her to spend on things that are not obligatory on him to provide.