J.F.
First off, you're not abusing mamasource. This is for mother's and ANY problems they may face not just problems concerning only their children. This woman is your kids aunt, therefore her actions affect them as long as she's around them. Sorry I just thought that comment was a little out of line and things like that cause problems when there shouldn't have been any to begin with. Back to your SIL, is she the type of person that seeks attention constantly? That could be the reason for the suicide comments BUT it could be sincere. My best friend killed himself 8 years ago so I know how devastating it can be to family and friends so if I were you I would err on the side of caution when it comes to suicide. When it comes to her husband I would do the best I can to ignore it all together. You can't change her mind about him and the more you try the more she is going to want to call him and be with him. I definitely think she needs some kind of counseling. Whatever happens good luck.
J.