The problem with your account is that it is all very speculative. And the worst harm you recite is that your mother didn't receive a Christmas present from the VP's wife. Now, you indicate that a lot of other stuff is going on, but it is hard to tell from what you have posted if what you describe would qualify as harassment, let alone if it would be actionable.

Your mother may be well-served to discuss this matter with a plaintiff-side employment lawyer in her state, including discussion of how she might be able to document any unlawful retaliation or harassment she may be suffering.