Is it unlawful for a woman to arouse her husband and reach orgasm without penetration if she is on the fifth day of her menstrual cycle, having performed ghusl and seen a drop of blood before that?

If the menstrual bleeding stops after seeing a drop, ghusl (definition) (ritual purification bath) becomes obligatory, and the husband is permitted to enjoy whatever he wishes except for intercourse until the wife performs ghusl. However, if menstruation has not ceased, the husband is permitted to enjoy everything except the private parts, and this is the more correct view. In neither case is expiation (kaffarah (definition)) required, but it is advisable to avoid such actions in the future.