WELCOME MERRYMO:Sounds like you are in a very uncomfortable situation. I'm so sorry about that. Past behavior predicts future behavior, especially with someone who isn't working on their behavior problems.
Currently she is also one of my supervisors in a work environment, and most recently, now a family member (I married this person's cousin after she set us up four years ago).
I don't intend to resume contact with her on a social level, but I am at a loss about how to handle family events, especially if it gets to a point where I remove her as a supervisor at work. . .
Gossiping about me to work colleagues and family members (this has been confirmed to me by a mutual friend/peer)
I'd take immediate steps to get assigned to another supervisor. Most companies of any notable size, wouldn't allow a situation where a supervisor and a direct report have some familial relationship. For the long run, no good can come from her being your supervisor.
How close is your partner to his cousin (your supervisor?) (i.e. how often would you anticipate minimal contact?)
I'm glad you are seeing a therapist. It is really helpful to have someone to discuss issues with.
Even if you remove BPD from the situation, workplace gossip is a common problem and even large companies that "talk the talk" of fairness and objectivity, don't "walk the walk".
I would recommend the following:- Get a different supervisor ASAP(as you referenced it is possible)
- Keep a CYA file and document all work situations with your current supervisor. (date, time, event, witnesses, etc.)
- Be a bit more diligent in regard to your work performance, so as to present a profile of the ideal employee (productivity, not spending too much time socializing, etc.)
- The BIFF RESPONSE might be helpful in the work environment
- MEDIUM CHILL might be helpful in social situations.
It is good that your husband is supportive. One goal would be to unite with establishing and enforcing common boundaries with your husband's cousin. With common boundaries, you have the best chance of preserving your sanity and shutting down and/or minimizing the drama associated with this person.