Is expiation required for one who swore not to enter her husband's family's homes and then entered them after reconciliation?

If what occurred was merely a prohibition against entering the husband's family's homes, then nothing is incumbent upon you, for a prohibition does not transform the permissible into the forbidden except in the case of prohibiting one's wife. According to the preponderant opinion, an expiation for an oath (kaffarat yameen) is due, based on the Almighty's saying: "O Prophet, why do you prohibit what Allah has made lawful for you, seeking to please your wives? And Allah is Forgiving, Merciful. Allah has already ordained for you the dissolution of your oaths. And Allah is your protector, and He is the All-Knower, the Wise."

However, if you swore by Allah, and the reason was problems that have since been resolved and reconciliation has occurred, then nothing is incumbent upon you. If this is not the case, then an expiation for an oath is due upon you, as stated in the Sahihayn and other collections, that the Messenger of Allah, may Allah bless him and grant him peace, said: "By Allah, if Allah wills, I do not swear an oath and then see something else as better than it, but I do that which is better and dissolve my oath." The expiation for an oath is feeding ten needy persons, or clothing them, or freeing a slave. But whoever cannot find [the means] - then fasting for three days.