Answered on Jan 04th, 2012 at 9:57 PM
Getting along with people is not always easy, and sometimes with your family it is the most difficult. I'm sorry for your trouble.
First, are you sure that your sister did indeed call? You may be worrying over a threat that she may not have followed through with.
Next, you need to be aware that there is an investigation division, and they receive similar "get even" calls every day. SSA doesn't pay benefits without sufficient proof - unless she has some evidence.
"If" SSA decides to investigate further, you will have an opportunity to respond. You will be notified in writing.
To be proactive, I would suggest contacting an attorney that works with Social Security. The "Find a Lawyer" link at the top of this page next to the nice outline of a house is a good place to start.
No attorney-client relationship has been established because of the information provided. Seek local counsel to address your particular facts. MJHJ