All perfect praise be to Allaah, The Lord of the Worlds. I testify that there is none worthy of worship except Allaah, and that Muhammad is His slave and Messenger. We ask Allaah to exalt his mention as well as that of his family and all his companions.
If someone breaks the fast for a valid reason in Ramadan, he does not have to fast the remainder of that day since it was permissible for him to break the fast. So he can eat and drink and have sexual intercourse with his wife if she was not fasting for a valid reason as well.
Allaah knows best.