What is the ruling of a woman whose husband had intercourse with her during her postnatal bleeding period?

It is prohibited for a man to have intercourse with his wife during menstruation or postnatal bleeding. It is prohibited for her to obey him in this. If this has occurred, then they must repent by regretting the action, intending never to repeat it, and asking Allah abundantly for His forgiveness; and by performing righteous deeds especially giving alms.