He might have felt disappointed or even angry that he was misled.
Maybe someone mislabeled the book as non - fiction. So, without realizing it was fiction, he started reading.
The person might face social problems. If word gets out that they were in such a situation, especially in a less accepting community, they could face discrimination or ostracism. They may also have difficulty in future relationships, either because they are now more guarded or because they are trying to figure out their own feelings that were jumbled up by this tricking incident.
His novels often have a very raw and honest feel. For example, in 'A Million Little Pieces', he doesn't hold back in describing his experiences with drug addiction and rehab, making the readers feel like they are really there with him.
In the case of a swap of services, she may end up overworked or in a situation where she is not getting what she expected. For example, if she was tricked into swapping babysitting services with someone who doesn't take good care of children, it can put her own children at risk and also create a lot of stress for her. And if it becomes known that she was tricked, it could also damage her reputation in the community.
Emotionally, it would be a huge turmoil. She might feel betrayed, angry, and confused all at once. On one hand, she has this false relationship that she was tricked into, and on the other hand, she has to deal with the fallout of realizing she was deceived. And she would have to figure out how to get out of the marriage legally and socially in the wizarding world, which could be a complex and difficult process.
It can also have a negative impact on your own values. Constantly being exposed to this type of inappropriate fictional content might desensitize you to the importance of respecting others' privacy and dignity. Moreover, it can be a waste of time that could be better spent on more positive and educational reading materials.
One possible effect is an expanded vocabulary. Since fiction often contains rich language, addicted readers are exposed to many new words. Another effect could be enhanced empathy. As we read about different characters' experiences in fiction, we can better understand others' feelings. Also, it might lead to a vivid imagination as the fictional worlds are full of creative and extraordinary ideas.
One possible consequence could be legal trouble if the novel involves things like plagiarism or violating copyright laws. Another consequence might be exposure to inappropriate or harmful ideas. Also, it could be a waste of time if the novel has no real literary value.
One possible consequence is a negative impact on your mental health. The inappropriate content can make you feel uneasy or guilty. Also, it can influence your values regarding relationships and sexuality in an improper way.
One consequence could be emotional distress. The wife may experience feelings of shame, anger, and sadness. She might also develop trust issues, not only towards the people at the party but also in social situations in general.