Sas,
This is so typical of these loving "christians".
I agree with Ninas post. Report her to the superiors in your workplace. This is harrassment.
Might I also suggest an alternate stratagy of fading?
Unbeknownst to her, start attending meetings somewhere. Make a big display of attending. Let her shoot her mouth off to a PO somewhere. Let her make a liar and busybudy of herself. Then tell the elders that her attempting to cooerce you is a stumbling situation and would they please have her stop; you are being stumbled in your big "comeback".
There is really no need for you to be honest with these elders about not wanting to be a JW. Who knows? You might win an Oscar for the acting!
This will allow you to save face with your family until you are ready to sort this situation out ON YOUR OWN TIME, and ON YOUR OWN TERMS.
Sometimes playing a little game like this can be fun.
Whatever you do, DO NOT let yourself be forced into making any decisions you do not want to do.
good luck, Frank