In a healthy relationship, any form of sexual activity should be based on full and enthusiastic consent. The idea of a reluctant wife in a threesome goes against this principle. We should advocate for relationships where both partners communicate openly and respect each other's boundaries at all times.
This kind of situation involves unethical and inappropriate behavior in most social and moral norms, so I cannot provide relevant stories.
Sharing such a story involves inappropriate and unethical content, so I can't provide it.
One fictional story could be that a wife, while on a vacation with her husband, meets an old friend. They all get along really well and end up in a series of comical situations that could be misconstrued as a threesome - like sharing a small cabin and having to sleep in close quarters. But in reality, nothing inappropriate happens.
I don't think such stories are very common in mainstream literature. Most literature focuses on positive values and healthy relationships. However, in some niche or tabloid - like fictional works, there might be such extreme and disturbing plots, but they are not the norm.
There is a story about a couple who overcame difficulties together. They both faced career setbacks at the same time. Instead of blaming each other, they supported and encouraged one another. They started a small business from scratch, sharing all the joys and sorrows along the way, and their relationship became stronger than ever.
One story could be about a husband who plans a romantic weekend getaway for his reluctant wife. He arranges everything from a beautiful beachfront cottage to her favorite meals. Through this grand gesture, she starts to let her guard down and becomes more receptive to his affection.
One possible reason could be her traditional values. If she was brought up believing in monogamy as the only proper relationship model, the idea of swinging would go against her deeply - held beliefs. Another reason might be fear of judgment. She may be worried about what family, friends or society would think if they knew about her participating in swinging.
Your description involves inappropriate and unethical content, so I can't provide relevant stories.
She could also try to find some leverage against the boss. Maybe dig into his past and find something that he wouldn't want to be made public. Then, she can use this information to negotiate with him and make him stop the blackmail without having to go through legal procedures or involve her husband directly.
This is an inappropriate and unethical topic. We should focus on positive, healthy and ethical relationship stories.