What is the expiation for breaking an oath sworn on the Mus'haf after returning to using Facebook, and is the daughter's illness related to that?

Swearing an oath on the Holy Quran increases the oath in emphasis and gravity. The wife must agree with her husband and obey him in what she has committed to and sworn an oath upon. If she breaks her oath, she must offer expiation for an oath, which is: feeding ten poor persons from the average of what you feed your own families, or clothing them, or freeing a slave. But whoever cannot find [the means] - then a fast of three days.