http://www.cdispatch.com/news/article.asp?aid=6979

In 2008, Chrissy Strickland successfully sued Melissa Simmons in Lowndes County Chancery Court for "alienation of affections" and was awarded $87,500, $30,000 in attorney fees and $500 in punitive damages.

Strickland''s husband, Chuck, cheated with Simmons, and it interfered with his ability to fulfill his legal spousal duties, according to court documents.

Still, other than a high-profile case of the same nature filed against the mistress of former Mississippi Congressman Chip Pickering, even the alienation of affection law is rarely used.

Read more: http://www.cdispatch.com/news/article.asp?aid=6979#ixzz30EKRC7HC

As of 2010 although few law enforcement officers are going to enforce those laws.  This is why it is important that you get evidence of adultery or cohabitation.  In Mississippi you can still sue the third party for alienation of affection.