Sister in Law's bipolar hurting my wife

[Guest_24698210]

My sister in law suffers bipolar. Although she recognises this and often takes her medication which calms her, often she stops taking the medication then starts emailing my wife. The messages are very hurtful and plentiful. She can send up to 48 messages overnight. My wife is distraught but fears any response may cause her sister to commit suicide. How do I support my wife? Should I suggest cutting the sister out of our lives altogether by blocking her phone number and email address? Fortunately she lives in another State. Is there a likelihood of her committing suicide if my wife doesn't respond or if she is cut out of our lives? 

[ABC01]

Hello Guest,

In a way no one can stop someone from doing something that they want to do. However it feels overwhelming and tricky when family is involved. In context being held “in fear or frozen” by another person’s potential threatening behaviour,isn’t fair to you or your wife. 
Is there anyone in her state that can look after your sister in law? Or help them connect with services there?
It is unfortunate that even if you do find services, your SIL may not want to take that help.

You may have to have a hard conversation with your wife on what you physically can and cannot do due to where you live, as well as emotionally tolerate.

You are already doing a great job at supporting your wife by reaching out here.

And I am sorry, but no one can accurately give you an answer on someone else’s behaviour unless they are your SIL’s mental health treating professionals.

I wish you and your wife well.

ABC01