What is the expiation for a wife drinking water during a ruqyah after she asked her husband to recite Al-Fatihah into it and forcefully made her drink it?

Drinking water during the daytime in Ramadan is, by consensus, one of the things that invalidate the fast. The wife must make up for the day on which she drank water. She is not required to offer expiation (kaffarah) unless the breaking of the fast was due to sexual intercourse. We hope she is not sinful if she thought it was permissible or if she was ill, but she could have continued with the Ruqyah and pouring water over her body, postponing drinking until after Maghrib.