Answer: If his wife’s shrewish behavior drives away employees, your boss may eventually find himself with empty offices and declining revenues. So if you can help him see the problem, you’ll be doing him a favor. Criticizing her is not without risk, however, because relatives always have special status in a family business. And if your boss is starting to echo his wife, then she must be influencing his opinions.
Since other employees share your concerns, the safest course is to meet with him as a group. If everyone expresses the same view, he will find it harder to deny the problem. Because you have been the primary target, someone else should serve as the spokesperson. Otherwise, your boss may consider you the ringleader and write this off as a personality conflict.
The key to success is describing the issue calmly, without personal attacks. For example: “We really appreciate the bookkeeping work that Mary is doing. However, she often seems unhappy with us, and we find it difficult to communicate with her. What do you think we should do about this?”
But if discussion seems too risky or your boss refuses to listen, just focus on your job search and try to view the witchy wife as a temporary annoyance. If you can emotionally detach, she will have less power to affect your mental health.