What is the ruling regarding a husband having intercourse with his pregnant, fasting, unwilling wife during the daytime in Ramadan while he is fasting, knowing that she is due to give birth after the end of next Ramadan?

If a husband has intercourse with his wife during the daytime in Ramadan (definition), and he is not among those for whom breaking the fast is permissible, then he has committed a grave sin and must repent. He is obligated to offer expiation for intercourse (kaffarat al-jima'), which, according to the majority of scholars, is in sequential order: freeing a slave, and if he cannot find one, then fasting for two consecutive months, and if he is unable to do that, then feeding sixty needy persons. As for the wife, it is not permissible for her to allow her husband to have intercourse with her during the daytime in Ramadan, and she must refuse.