Is disclosing a secret, which one swore to keep confidential—after parts of it have been revealed—considered a breach of oath that necessitates expiation?

The questioner erred by revealing her cousin's secret after swearing not to tell anyone, and this is a characteristic of hypocrisy. She must perform sincere repentance and an expiation for her broken oath, which is feeding ten poor persons, clothing them, or emancipating a slave. If she cannot find these, then fasting for three days, as Allah Almighty says: "Allah will not impose blame upon you for what is unintentional in your oaths, but He will impose blame upon you for what you intended of oaths. So its expiation is the feeding of ten needy people from the average of that which you feed your [own] families or clothing them or the freeing of a slave. But whoever cannot find [or afford it] - then a fast of three days [is required]. That is the expiation for oaths when you have sworn" (Al-Ma'idah: 89).